Information processing method, apparatus and equipment based on weak measurement technology

Abstract

This application discloses an information processing method, apparatus, and device based on weak measurement technology. The method includes: encoding target information into the relative phase of a pre-prepared first quantum state to obtain a second quantum state, the second quantum state including the target information; transmitting the second quantum state through a target channel and representing the transmission result through a density matrix, including the noisy target information after passing through the target channel, wherein the target channel may exhibit optical rotation effects, random telegraph noise, amplitude damping, phase damping, or depolarization noise; decoding the second quantum state based on four pairwise orthogonal weak measurement decoders to obtain the decoding result. After analyzing the decoding result, the target information amplified by weak measurement technology can be obtained. Thus, this method can estimate the target information without resource loss, with high sensitivity and relatively high accuracy, thereby helping to effectively suppress the effects of noise and interference during transmission, thereby improving communication performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of quantum technology, and in particular, to an information processing method, device and equipment based on weak measurement technology. BACKGROUND

[0002] With the continuous development of quantum information technology, quantum states gradually become one of the carriers of encoding and transmitting information in long-distance communication. However, in long-distance communication, information after passing through a channel often introduces noise, such as noise or interference of the channel itself, or noise caused by the interaction between the communication system and the channel. In this way, when quantum states are used as carriers of long-distance communication, these noises or interferences will affect the communication quality, resulting in poor communication effect. SUMMARY

[0003] Embodiments of the present application provide an information processing method, device and equipment based on weak measurement technology to effectively suppress the influence of noise and interference in transmission, thereby improving the communication effect.

[0004] In a first aspect, embodiments of the present application provide an information processing method based on weak measurement technology, comprising:

[0005] transmitting the second quantum state through a target channel, and representing the transmission result by a density matrix, the target channel comprising at least one of a first channel with optical rotation effect, a second channel with random telegraph noise, a third channel with amplitude damping noise, a fourth channel with phase damping noise, and a fifth channel with depolarization noise, and the density matrix comprising target information with noise after passing through the target channel;

[0006] decoding the density matrix based on four weak measurement decoders that are pairwise orthogonal to obtain a decoding result, the decoding result comprising target information with noise amplified based on weak measurement technology;

[0007] analyzing the decoding result to determine target information corresponding to the decoding result.

[0008] Optionally, the transmitting the second quantum state through a target channel comprises:

[0009] In the case where the target channel is the first channel with optical rotation effect, in the process of transmitting the second quantum state through the first channel with optical rotation effect, a first rotation angle caused by the first channel with optical rotation effect on the second quantum state and first information are obtained, the first information being target information with noise after passing through the first channel with optical rotation effect;

[0010] In the case that the target channel is the second channel with random telegraph noise, in the process of transmitting the second quantum state through the second channel with random telegraph noise, a second rotation angle caused by the second channel with random telegraph noise on the second quantum state and second information are obtained, the second information being target information after being disturbed by the second channel with random telegraph noise.

[0011] In the case that the target channel is the third channel with amplitude damping noise, in the process of transmitting the second quantum state through the third channel with amplitude damping noise, a third rotation angle caused by the third channel with amplitude damping noise on the second quantum state and third information are obtained, the third information being target information after being disturbed by the third channel with amplitude damping noise.

[0012] In the case that the target channel is the fourth channel with phase damping noise, in the process of transmitting the second quantum state through the fourth channel with phase damping noise, a fourth rotation angle caused by the fourth channel with phase damping noise on the second quantum state and fourth information are obtained, the fourth information being target information after being disturbed by the fourth channel with phase damping noise.

[0013] In the case that the target channel is the fifth channel with depolarizing noise, in the process of transmitting the second quantum state through the fifth channel with depolarizing noise, a fifth rotation angle caused by the fifth channel with depolarizing noise on the second quantum state and fifth information are obtained, the fifth information being target information after being disturbed by the fifth channel with depolarizing noise.

[0014] Optionally, the four two-by-two orthogonal weak measurement decoders decode the density matrix to obtain decoding results, including:

[0015] The transmitted second quantum state is split into four paths by a beam splitter to obtain four transmission results.

[0016] The four transmission results are decoded by four weak measurement decoders one by one to obtain decoding results output by the four weak measurement decoders.

[0017] Optionally, the decoding results are analyzed to determine target information corresponding to the decoding results, including:

[0018] Any three decoding results in the decoding results corresponding to the four transmission results are analyzed to obtain target information after amplification by the weak measurement technology.

[0019] The noisy target information amplified by the weak measurement technique is processed to obtain the target information.

[0020] Optionally, the four pairwise orthogonal weak measurement decoders include a first weak measurement decoder, a second weak measurement decoder, a third weak measurement decoder, and a fourth weak measurement decoder, all of which are pairwise orthogonal; the step of analyzing any three decoding results corresponding to the four transmission results to obtain the noisy target information amplified based on weak measurement technology includes:

[0021] calculate The noisy target information amplified by cot2ε using the weak measurement technique is obtained.

[0022] Where, N 11 N represents the decoding result output by the first weak measurement decoder. 12 N represents the decoding result output by the second weak measurement decoder. 21 N is the decoding result output by the third weak measurement decoder. 22 The decoding result is the output of the fourth weak measurement decoder, where ε is the angle parameter.

[0023] Secondly, embodiments of this application provide an information processing apparatus based on weak measurement technology, comprising:

[0024] An encoding module is used to encode target information into the relative phase of a pre-prepared first quantum state to obtain a second quantum state, wherein the second quantum state includes the target information;

[0025] A transmission module is used to transmit the second quantum state through a target channel and represent the transmission result through a density matrix. The target channel includes at least one of a first channel with optical rotation effect, a second channel with random telegraph noise, a third channel with amplitude damping noise, a fourth channel with phase damping noise, and a fifth channel with depolarization noise. The density matrix includes noisy target information after passing through the target channel.

[0026] The decoding module is used to decode the transmitted second quantum state based on four pairwise orthogonal weak measurement decoders to obtain a decoding result, which includes noisy target information amplified based on weak measurement technology.

[0027] The analysis module is used to analyze the decoding result and obtain the target information corresponding to the decoding result.

[0028] Optionally, the decoding module includes:

[0029] The splitting module is configured to split the transmitted second quantum state into four paths by a beam splitter.

[0030] The decoding sub-module is configured to decode the four paths of transmission results one by one by four weak measurement decoders to obtain decoding results output by the four weak measurement decoders respectively.

[0031] Optionally, the analysis module comprises:

[0032] The analysis sub-module is configured to analyze any three decoding results in the decoding results corresponding to the four paths of transmission results respectively to obtain the target information amplified based on the weak measurement technology and containing noise.

[0033] The processing module is configured to process the target information amplified based on the weak measurement technology and containing noise to obtain the target information.

[0034] In a third aspect, an electronic device is provided, and the device comprises a processor, a memory and a system bus.

[0035] The processor and the memory are connected through the system bus.

[0036] The memory is configured to store a program, and the program comprises instructions which, when executed by the processor, cause the processor to perform any implementation step of the information processing method based on the weak measurement technology.

[0037] In a fourth aspect, a computer readable storage medium is provided, and the computer readable storage medium stores instructions, and when the instructions run on an electronic device, the electronic device performs any implementation step of the information processing method based on the weak measurement technology.

[0038] From the above technical solutions, it can be seen that the embodiments of the present application have the following advantages:

[0039] In the embodiment of the present application, after the target information is encoded into the relative phase of the first quantum state prepared in advance to obtain the second quantum state including the target information, the second quantum state can be transmitted through a target channel, and the transmission result is represented by a density matrix, wherein the target channel includes at least one of a first channel with optical rotation effect, a second channel with random telegraph noise, a third channel with amplitude damping noise, a fourth channel with phase damping noise, and a fifth channel with depolarizing noise. The target information with noise after the target channel can be included in the density matrix. Then, the transmission result, i.e., the second quantum state after transmission, can be decoded based on four weak measurement decoders that are orthogonal to each other in pairs to obtain a decoding result, the decoding result including the target information with noise amplified based on the weak measurement technology, and then the decoding result is analyzed to determine the target information corresponding to the decoding result. As can be seen, when the quantum state is used as the carrier for information encoding, considering the noise or interference of different channels, i.e., at least one of the first channel with optical rotation effect, the second channel with random telegraph noise, the third channel with amplitude damping noise, the fourth channel with phase damping noise, and the fifth channel with depolarizing noise, the decoding is performed through the four weak measurement decoders that are orthogonal to each other in pairs, the target information with noise after transmission can be amplified, and the loss of the target information can be avoided. In this way, when the target information with noise after amplification is analyzed, the original target information can be accurately determined, thereby effectively suppressing the influence of noise and interference in transmission, and thereby improving the communication effect. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 A flowchart of an information processing method based on weak measurement technology provided by the embodiment of the present application;

[0041] Figure 2 An overall architecture diagram of an information processing method based on weak measurement technology provided by the embodiment of the present application;

[0042] Figure 3 A structure diagram of an information processing device based on weak measurement technology provided by the embodiment of the present application. DETAILED DESCRIPTION

[0043] As described above, in long-distance communication, information after the channel often introduces noise, for example, noise or interference of the channel itself, or noise caused by the interaction between the communication system and the channel. In this way, when the quantum state is used as the carrier for long-distance communication, these noises or interferences will affect the communication quality, resulting in poor communication effect.

[0044] Based on this, in order to solve the above problems, the embodiment of the present application provides an information processing method based on weak measurement technology, which can include: encoding target information into the relative phase of the first quantum state prepared in advance to obtain the second quantum state including the target information, then transmitting the second quantum state through the target channel, and transmitting the result through the density matrix representation, wherein the target channel includes at least one of the first channel with optical rotation effect, the second channel with random telegraph noise, the third channel with amplitude damping noise, the fourth channel with phase damping noise, and the fifth channel with depolarization noise. The target information containing noise after the target channel can be included in the density matrix. Then, the second quantum state after transmission can be decoded based on four two-by-two orthogonal weak measurement decoders to obtain a decoding result, the decoding result including the target information containing noise amplified based on the weak measurement technology, and then analyzing the decoding result to determine the target information corresponding to the decoding result.

[0045] As can be seen, when quantum states are used as information encoding carriers, considering the noise or interference of different channels, that is, at least one of the first channel with optical rotation effect, the second channel with random telegraph noise, the third channel with amplitude damping noise, the fourth channel with phase damping noise, and the fifth channel with depolarization noise, the target information containing noise after transmission can be amplified by the four two-by-two orthogonal weak measurement decoders, and the loss of target information can be avoided. In this way, when the amplified target information containing noise is analyzed subsequently, the original target information can be accurately determined, thereby effectively suppressing the influence of noise and interference in transmission, thereby improving the communication effect.

[0046] It should be noted that the embodiment of the present application can not limit the execution subject of the information processing method based on weak measurement technology, for example, the information processing method based on weak measurement technology of the embodiment of the present application can be applied to terminal equipment or server and other data processing equipment. The terminal equipment can be a smart phone, a computer, a personal digital assistant (PDA), a tablet computer, and other electronic devices. The server can be a standalone server, a cluster server, or a cloud server.

[0047] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0048] Figure 1A flowchart of an information processing method based on weak measurement technology provided in an embodiment of the present application, Figure 2 A whole architecture diagram of an information processing method based on weak measurement technology provided in an embodiment of the present application. As shown in Figure 1 and Figure 2 The information processing method based on weak measurement technology provided in the embodiment of the present application can include the following steps.

[0049] S101: Encode target information into the relative phase of a first quantum state prepared in advance to obtain a second quantum state.

[0050] Here, the target information refers to the to-be-encoded information that needs to be transmitted remotely. Since the processing process of the quantum state is usually performed at a specific moment, the processing result depends on the specific form of the quantum state at the specific moment, and therefore, the above target information specifically refers to the target information at the current moment. The first quantum state refers to the initial quantum state prepared in advance. In the embodiment of the present application, as shown in Figure 2 the preparation process of the first quantum state can be performed first to obtain the first quantum state and then the process of encoding the target information to obtain the second quantum state is performed.

[0051] Based on this, the encoding process of the above target information can be implemented by first encoding the target information into the relative phase of the first quantum state |0>+|1> to obtain the encoded quantum state, that is, the second quantum state where e is the natural logarithm, i is the imaginary unit, and the above target information. As can be seen from the representation form of the second quantum state, the second quantum state can include the target information.

[0052] S102: Transmit the second quantum state through a target channel and transmit the result through a density matrix.

[0053] The channel refers to a medium or process through which data is transmitted from one point to another. Different channels may be affected by different types of noise, which can interfere with information transmission and cause information loss or errors.

[0054] In the embodiment of the present application, the target channel can specifically include at least one of a first channel with optical rotation effect, a second channel with random telegraph noise, a third channel with amplitude damping noise, a fourth channel with phase damping noise, and a fifth channel with depolarization noise. In order to facilitate understanding, the following describes the above five channels and the implementation process of transmitting the second quantum state through each channel.

[0055] For the first channel with optical rotation effect, the optical rotation effect is usually related to the change of polarization state in the first channel. In quantum communication, a quantum bit can be encoded on the polarization state of a photon. The optical rotation effect will cause the rotation of the photon polarization state, thereby affecting the accuracy of information transmission.

[0056] Based on this, in the case that the above target channel is the first channel with optical rotation effect, in the process of transmitting the second quantum state through the first channel with optical rotation effect, the target information in the second quantum state can become the first information after passing through the first channel, that is, the target information with noise after passing through the first channel with optical rotation effect. And the first channel will also cause a first rotation angle to the second quantum state. In this way, in the process of transmitting the second quantum state through the first channel with optical rotation effect, the first rotation angle caused by the first channel with optical rotation effect to the second quantum state and the first information can be obtained. Further, the density matrix for representing the transmission result of the second quantum state in the above first channel is:

[0057]

[0058] Where e is the natural logarithm, i is the imaginary unit, is the first rotation angle, is the first information.

[0059] For the second channel with random telegraph noise, the random telegraph noise is a noise that randomly appears in time, and its effect is similar to a random switch. In a quantum channel, the random telegraph noise can cause random flipping or phase change of a quantum bit, thereby affecting the accuracy of information transmission.

[0060] Based on this, in the case that the above target channel is the second channel with random telegraph noise, in the process of transmitting the second quantum state through the second channel with random telegraph noise, the target information in the second quantum state can become the second information after passing through the second channel, that is, the target information with noise after passing through the second channel with random telegraph noise. And the second channel will also cause a second rotation angle to the second quantum state. In this way, in the process of transmitting the second quantum state through the second channel with random telegraph noise, the second rotation angle caused by the second channel with random telegraph noise to the second quantum state and the second information can be obtained. Further, the density matrix for representing the transmission result of the second quantum state in the above second channel is:

[0061]

[0062] Where Λ(t) is the memory kernel function, i is the imaginary unit, is the second rotation angle, is the second information. In addition, it should be noted that in quantum mechanics, the memory kernel can be used to describe the non-Markovian dynamics of quantum systems.

[0063] For the third channel with amplitude damping noise, the amplitude damping noise will affect the amplitude of the quantum system, similar to the dissipation in classical systems. In quantum channels, this noise can cause the energy of the quantum state to decrease, thereby affecting the accuracy of information transmission.

[0064] Based on this, in the case where the above target channel is the third channel with amplitude damping noise, in the process of transmitting the second quantum state through the third channel with amplitude damping noise, the target information in the second quantum state can become the third information after passing through the third channel, i.e., the noisy target information after passing through the third channel with amplitude damping. And the third channel will also cause a third rotation angle to the second quantum state. In this way, in the process of transmitting the second quantum state through the third channel with amplitude damping noise, the third rotation angle caused by the third channel with amplitude damping noise to the second quantum state and the third information can be obtained. Further, the density matrix for representing the transmission result of the second quantum state in the above third channel is:

[0065]

[0066] where γ is the amplitude damping strength in the third channel, i is the imaginary unit, is the third rotation angle, is the third information set.

[0067] For the fourth channel with phase damping noise, the phase damping noise will cause the phase information of the quantum state to decay over time. This noise is very harmful to quantum computing and quantum communication, because it will destroy quantum superposition and quantum entanglement, thereby affecting the accuracy of information transmission.

[0068] Based on this, in the case where the above target channel is the fourth channel with phase damping noise, the target information in the second quantum state can become the fourth information after passing through the fourth channel, i.e., the noisy target information after passing through the fourth channel with phase damping. And the fourth channel will also cause a fourth rotation angle to the second quantum state. In this way, in the process of transmitting the second quantum state through the fourth channel with phase damping noise, the fourth rotation angle caused by the fourth channel with phase damping noise to the second quantum state and the fourth information can be obtained. Further, the density matrix for representing the transmission result of the second quantum state in the above fourth channel is:

[0069]

[0070] where λ is the phase damping strength in the fourth channel, i is the imaginary unit, for the fourth rotation angle, for the fourth information set.

[0071] For the fifth channel with depolarizing noise, the depolarizing noise refers to that a quantum bit randomly de-coheres from a polarized state to its non-polarized state. Such noise reduces the purity of the quantum state, causes the loss of quantum information, and thus affects the accuracy of information transmission.

[0072] Based on this, in the case that the above target channel is the fifth channel with depolarizing noise, in the process of transmitting the second quantum state through the fifth channel with depolarizing noise, the target information in the second quantum state can become the fifth information after passing through the fifth channel, that is, the noisy target information after passing through the fifth channel with depolarizing noise. Moreover, the fifth channel also causes the fifth rotation angle to the second quantum state. In this way, in the process of transmitting the second quantum state through the fifth channel with depolarizing noise, the fifth rotation angle caused by the fifth channel with depolarizing noise to the second quantum state and the fifth information can be obtained. Further, the density matrix for representing the transmission result of the second quantum state in the above fifth channel is:

[0073]

[0074] wherein p is the depolarization probability in the fifth channel, i is an imaginary unit, for the fifth rotation angle, for the fifth information set.

[0075] S103: Decoding the transmitted second quantum state based on the four weak measurement decoders that are pairwise orthogonal, to obtain a decoding result.

[0076] The decoding result can include the noisy target information amplified based on the weak measurement technology. Based on this, in the embodiments of the present application, the decoding process, that is, step S103, can not be specifically limited, and for the convenience of understanding, the following will be described in combination with a possible implementation manner.

[0077] As a possible implementation, the step S103 can include: splitting the transmitted second quantum state into four paths by a beam splitter; and decoding the four paths of transmission results by the four weak measurement decoders one by one to obtain the decoding results output by the four weak measurement decoders respectively. It can be seen that in the specific implementation, the channel transmission results can be uniformly split into four paths by the beam splitter to obtain the four paths of transmission results. Then, the four paths of transmission results can be input into the four weak measurement decoders one by one to obtain the decoding results corresponding to the four paths of transmission results output by the weak measurement decoders respectively. In this way, the weak measurement technology provided by the weak measurement decoders can amplify the noisy target information after transmission and avoid the loss of the target information. In this way, when the amplified noisy target information is analyzed subsequently, the original target information can be determined more accurately, thereby effectively suppressing the influence of noise and interference in transmission, thereby improving the communication effect. Moreover, the information decoding can be performed without significantly changing the state of the quantum system with the aid of the weak measurement encoder, thereby widening the application of the weak measurement technology in the field of communication.

[0078] Further, in actual application, in combination with Figure 2 As shown in FIG. 1, the four weak measurement decoders can be denoted as a weak measurement decoder 11, a weak measurement decoder 12, a weak measurement decoder 21 and a weak measurement decoder 22 respectively.

[0079] Based on this, for the weak measurement decoder 11, the measurement basis where e is a natural logarithm, i is an imaginary unit, and ε is an angle parameter. Correspondingly, the output result N 11 of the weak measurement decoder 11 can be represented as where N0 is the number of the prepared first quantum state, and ρ is the density matrix representation of the second quantum state, which can be ρ r , ρ RTN , ρ AD , ρ PD or ρ DP , and Tr[·] is a trace operation. is the noisy information obtained after the target information in the second quantum state passes through the target channel, which can be or

[0080] For the weak measurement decoder 12, the measurement basis where e is a natural logarithm, i is an imaginary unit, and ε is an angle parameter. Correspondingly, the output result N 12 of the weak measurement decoder 12 can be represented as where N0 is the number of the prepared first quantum state, and ρ is the density matrix representation of the second quantum state, which can be ρ r , ρRTN , p AD , p PD or p DP , Tr[·] is a trace operation, is the noisy information obtained by the target information in the second quantum state after passing through the target channel, which can be specifically or

[0081] For the weak measurement decoder 21, the measurement basis where e is the natural logarithm, i is the imaginary unit, and ε is the angle parameter. Correspondingly, the output result N of the weak measurement decoder 21 21 , which can be expressed as where N0 is the number of prepared first quantum states, and ρ is the density matrix representation of the second quantum state, which can be specifically r , p RTN , p AD , p PD or p DP , Tr[·] is a trace operation, is the noisy information obtained by the target information in the second quantum state after passing through the target channel, which can be specifically or

[0082] For the weak measurement decoder 22, the measurement basis where e is the natural logarithm, i is the imaginary unit, and ε is the angle parameter. Correspondingly, the output result N of the weak measurement decoder 22 22 , which can be expressed as where N0 is the number of prepared first quantum states, and ρ is the density matrix representation of the second quantum state, which can be specifically r , p RTN , p AD , p PD or p DP , Tr[·] is a trace operation, is the noisy information obtained by the target information in the second quantum state after passing through the target channel, which can be specifically or

[0083] S104: Analyzing the decoding result to determine the target information corresponding to the decoding result.

[0084] In the embodiments of the present application, the process of analyzing the decoding results can include: analyzing any three decoding results in the decoding results corresponding to the four-way transmission results respectively to obtain the target information amplified based on the weak measurement technology and containing noise; and processing the target information amplified based on the weak measurement technology and containing noise to obtain the target information. Since any three decoding results are analyzed and processed to obtain the target information amplified and containing noise, and in the prior art, the four-way transmission results are used to further increase the fault tolerance and facilitate long-distance information transmission. Figure 2

[0085] In the specific implementation, in combination with the output results N 11 , N 12 , N 21 and N 22 of the weak measurement decoders 11, 12, 21 and 22 respectively, the process of analyzing any three decoding results can be embodied as follows: first, calculating or to obtain the target information amplified based on the weak measurement technology and containing noise , that is, the target information amplified by cot2ε times and containing noise Then, since the target information is included in the noise-containing information, and the target information carries noise after passing through the target channel, the target information can be obtained by processing the target information amplified based on the weak measurement technology and containing noise.

[0086] ​Based on the related content of the above steps S101-S104, in the embodiment of the present application, after the target information is encoded into the relative phase of the first quantum state prepared in advance to obtain the second quantum state including the target information, the second quantum state can be transmitted through a target channel, and the transmission result is represented by a density matrix, wherein the target channel includes at least one of a first channel with optical rotation effect, a second channel with random telegraph noise, a third channel with amplitude damping noise, a fourth channel with phase damping noise, and a fifth channel with depolarizing noise. The target information containing noise after passing through the target channel can be included in the density matrix. Then, the transmitted second quantum state can be decoded based on four weak measurement decoders that are orthogonal to each other in pairs to obtain a decoding result, the decoding result including the target information containing noise amplified based on the weak measurement technology, and then the decoding result is analyzed to determine the target information corresponding to the decoding result. As can be seen, when quantum states are used as information encoding carriers, considering the noise or interference of different channels, i.e., at least one of the first channel with optical rotation effect, the second channel with random telegraph noise, the third channel with amplitude damping noise, the fourth channel with phase damping noise, and the fifth channel with depolarizing noise, the decoding is performed through four weak measurement decoders that are orthogonal to each other in pairs, the target information containing noise after transmission can be amplified, and the loss of the target information can be avoided. In this way, when the amplified target information containing noise is analyzed subsequently, the original target information can be accurately determined, thereby effectively suppressing the influence of noise and interference in transmission, and thereby improving the communication effect.

[0087] Further, based on the information processing method based on the weak measurement technology provided in the above embodiment, the embodiment of the present application can also provide an information processing device based on the weak measurement technology. The information processing device based on the weak measurement technology will be described below in combination with embodiments and drawings.

[0088] Figure 3 The structure diagram of an information processing device based on the weak measurement technology provided in the embodiment of the present application is shown. In combination with Figure 3 the information processing device based on the weak measurement technology 300 provided in the embodiment of the present application can include:

[0089] The encoding module 301 is configured to encode the target information into the relative phase of the first quantum state prepared in advance to obtain the second quantum state, and the second quantum state includes the target information.

[0090] The transmission module 302 is configured to transmit the second quantum state through a target channel, and transmit a result of the transmission through a density matrix, the target channel including at least one of a first channel with optical rotation effect, a second channel with random telegraph noise, a third channel with amplitude damping noise, a fourth channel with phase damping noise, and a fifth channel with depolarizing noise, and the density matrix including target information with noise after passing through the target channel.

[0091] The decoding module 303 is configured to decode the transmitted second quantum state based on four weak measurement decoders that are pairwise orthogonal, to obtain a decoding result, the decoding result including target information with noise amplified based on a weak measurement technique.

[0092] The analysis module 304 is configured to analyze the decoding result to determine target information corresponding to the decoding result.

[0093] As an implementation form, the transmission module 302 includes:

[0094] The first transmission module is configured to, in a case where the target channel is the first channel with optical rotation effect, acquire a first rotation angle caused by the first channel with optical rotation effect on the second quantum state and first information in a process of transmitting the second quantum state through the first channel with optical rotation effect, the first information being target information with noise after passing through the first channel with optical rotation effect.

[0095] The second transmission module is configured to, in a case where the target channel is the second channel with random telegraph noise, acquire a second rotation angle caused by the second channel with random telegraph noise on the second quantum state and second information in a process of transmitting the second quantum state through the second channel with random telegraph noise, the second information being target information with noise after passing through the second channel with random telegraph noise.

[0096] The third transmission module is configured to, in a case where the target channel is the third channel with amplitude damping noise, acquire a third rotation angle caused by the third channel with amplitude damping noise on the second quantum state and third information in a process of transmitting the second quantum state through the third channel with amplitude damping noise, the third information being target information with noise after passing through the third channel with amplitude damping noise.

[0097] the fourth transmission module is configured to, in a case where the target channel is the fourth channel with phase damping noise, acquire a fourth rotation angle caused by the fourth channel with phase damping noise on the second quantum state and fourth information in a process of transmitting the second quantum state through the fourth channel with phase damping noise, the fourth information being target information with noise after passing through the fourth channel with phase damping noise;

[0098] the fifth transmission module is configured to, in a case where the target channel is the fifth channel with depolarizing noise, acquire a fifth rotation angle caused by the fifth channel with depolarizing noise on the second quantum state and fifth information in a process of transmitting the second quantum state through the fifth channel with depolarizing noise, the fifth information being target information with noise after passing through the fifth channel with depolarizing noise.

[0099] As an implementation form, the decoding module 303 comprises:

[0100] the dividing module is configured to divide the transmitted second quantum state into four paths of transmission results through a beam splitter;

[0101] the decoding submodule is configured to decode the four paths of transmission results one by one through four weak measurement decoders to obtain decoding results output by the four weak measurement decoders respectively.

[0102] As an implementation form, the analysis module 304 comprises:

[0103] the analysis submodule is configured to analyze any three decoding results in the decoding results corresponding to the four paths of transmission results respectively to obtain the target information with noise amplified based on the weak measurement technology;

[0104] the processing module is configured to process the target information with noise amplified based on the weak measurement technology to obtain the target information.

[0105] As an implementation form, the four weak measurement decoders orthogonal to each other comprise a first weak measurement decoder, a second weak measurement decoder, a third weak measurement decoder and a fourth weak measurement decoder orthogonal to each other; the analysis submodule comprises:

[0106] the calculation module is configured to calculate or to obtain the target information with noise amplified cot2ε times based on the weak measurement technology ;

[0107] wherein, N 11 is the decoding result output by the first weak measurement decoder, N 12a decoding result output by the second weak measurement decoder, N 21 a decoding result output by the third weak measurement decoder, N 22 a decoding result output by the fourth weak measurement decoder, ε is an angle parameter.

[0108] Further, the embodiment of the present application further provides an electronic device, comprising: a processor, a memory, a system bus;

[0109] The processor and the memory are connected through the system bus;

[0110] The memory is used for storing one or more programs, the one or more programs comprising instructions, the instructions causing the processor to execute any implementation step of the above-mentioned information processing method based on weak measurement technology when executed by the processor.

[0111] Further, the embodiment of the present application further provides a computer readable storage medium, the computer readable storage medium storing instructions, the instructions causing any implementation step of the above-mentioned information processing method based on weak measurement technology when running on an electronic device.

[0112] From the above description of the embodiments, those skilled in the art can clearly understand that all or part of the steps in the above-mentioned embodiment methods can be implemented by means of software and necessary universal hardware platforms. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, which can be stored in a storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions to make a computer device (which can be a personal computer, a server, or a network communication device such as a media gateway, etc.) execute the methods described in the various embodiments or some parts of the embodiments. It should be noted that the various embodiments in the present specification are described in a progressive manner, and each embodiment mainly describes the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0113] For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the related parts are referred to the method part.

[0114] It is also to be noted that, as used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component" can include a combination of two or more components, and the term "an element" can include comparable reference to a plurality of elements. Additionally, the term "or" as used herein in the context of a list of items prefaced by "at least one of' means any single one of the items in the list and any combination of two or more of the items in the list. Further, the term "comprises" or "comprising" as used herein is intended to have a broad meaning in its conventional sense, specifically to mean that the item or items listed after the term are included, but not to the exclusion of any additional item or items. Additionally, the term "comprises" or "comprising" as used herein is intended to have a broad meaning in its conventional sense, specifically to mean that the item or items listed after the term are included, but not to the exclusion of any additional item or items. Additionally, the term "comprises" or "comprising" as used herein is intended to have a broad meaning in its conventional sense, specifically to mean that the item or items listed after the term are included, but not to the exclusion of any additional item or items. Additionally, the term "comprises" or "comprising" as used herein is intended to have a broad meaning in its conventional sense, specifically to mean that the item or items listed after the term are included, but not to the exclusion of any additional item or items.

[0115] The foregoing description of the disclosed embodiments enables a person skilled in the art to implement or use the application. Numerous modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An information processing method based on weak measurement technique, characterized by, The method comprises the following steps: encoding target information into a relative phase of a first quantum state to obtain a second quantum state, wherein the second quantum state comprises the target information; transmitting the second quantum state through a target channel, wherein the target channel comprises at least one of a first channel with optical rotation effect, a second channel with random telegraph noise, a third channel with amplitude damping noise, a fourth channel with phase damping noise, and a fifth channel with depolarizing noise, and the target information after being transmitted through the target channel comprises a noisy target information; decoding the second quantum state after being transmitted through the target channel based on four weak measurement decoders that are orthogonal to each other to obtain a decoding result, wherein the four weak measurement decoders that are orthogonal to each other comprise a first weak measurement decoder, a second weak measurement decoder, a third weak measurement decoder, and a fourth weak measurement decoder, and the decoding result comprises the noisy target information amplified based on a weak measurement technology; analyzing the decoding result to determine the target information corresponding to the decoding result. In the step of decoding the second quantum state after being transmitted through the target channel based on the four weak measurement decoders that are orthogonal to each other to obtain a decoding result, the method comprises the following steps: dividing the second quantum state after being transmitted through the target channel into four paths through a beam splitter; decoding the four paths of the second quantum state after being transmitted through the target channel through the four weak measurement decoders one by one to obtain decoding results output by the four weak measurement decoders respectively. In the step of analyzing the decoding result to determine the target information corresponding to the decoding result, the method comprises the following step: Computing , , or , obtaining said times ; wherein is a decoding result output by the first weak measurement decoder, is a decoding result output by the second weak measurement decoder, is a decoding result output by the third weak measurement decoder, is a decoding result output by the fourth weak measurement decoder, is an angle parameter; processing the noisy target information amplified based on the weak measurement technology to obtain the target information.

2. The information processing method based on weak measurement technology according to claim 1, wherein In the step of transmitting the second quantum state through the target channel, the method comprises the following steps: in a case where the target channel is the first channel with optical rotation effect, obtaining a first rotation angle and first information caused by the first channel with optical rotation effect to the second quantum state in a process of transmitting the second quantum state through the first channel with optical rotation effect, wherein the first information is the noisy target information after being transmitted through the first channel with optical rotation effect; in a case where the target channel is the second channel with random telegraph noise, obtaining a second rotation angle and second information caused by the second channel with random telegraph noise to the second quantum state in a process of transmitting the second quantum state through the second channel with random telegraph noise, wherein the second information is the noisy target information after being transmitted through the second channel with random telegraph noise; in a case where the target channel is the third channel with amplitude damping noise, obtaining a third rotation angle and third information caused by the third channel with amplitude damping noise to the second quantum state in a process of transmitting the second quantum state through the third channel with amplitude damping noise, wherein the third information is the noisy target information after being transmitted through the third channel with amplitude damping noise. In a case where the target channel is the fourth channel with phase damping noise, in the process of transmitting the second quantum state through the fourth channel with phase damping noise, a fourth rotation angle caused by the fourth channel with phase damping noise on the second quantum state and fourth information are obtained, the fourth information being target information with noise after passing through the fourth channel with phase damping noise; In a case where the target channel is the fifth channel with depolarizing noise, in the process of transmitting the second quantum state through the fifth channel with depolarizing noise, a fifth rotation angle caused by the fifth channel with depolarizing noise on the second quantum state and fifth information are obtained, the fifth information being target information with noise after passing through the fifth channel with depolarizing noise.

3. An information processing apparatus based on weak measurement technique, characterized by, Comprise: An encoding module, configured to encode target information into a relative phase of a first quantum state prepared in advance to obtain a second quantum state, the second quantum state comprising the target information; A transmission module, configured to transmit the second quantum state through a target channel, and transmit a result of the transmission through a density matrix, the target channel comprising at least one of a first channel with optical rotation effect, a second channel with random telegraph noise, a third channel with amplitude damping noise, a fourth channel with phase damping noise, and a fifth channel with depolarizing noise, the density matrix comprising target information with noise after passing through the target channel; A decoding module, configured to decode the second quantum state after transmission based on four weak measurement decoders that are pairwise orthogonal to obtain a decoding result, the four weak measurement decoders that are pairwise orthogonal comprising a first weak measurement decoder, a second weak measurement decoder, a third weak measurement decoder, and a fourth weak measurement decoder, the decoding result comprising target information with noise amplified based on a weak measurement technique; An analysis module, configured to analyze the decoding result to determine target information corresponding to the decoding result; The decoding module comprises: A division module, configured to divide the second quantum state after transmission into four paths of transmission result through a beam splitter; A decoding submodule, configured to decode the four paths of transmission result one by one through the four weak measurement decoders to obtain decoding results output by the four weak measurement decoders respectively; The analysis module comprises: an analysis submodule, configured to calculate , , or , to obtain the times ; wherein, is a decoding result output by the first weak measurement decoder, is a decoding result output by the second weak measurement decoder, is a decoding result output by the third weak measurement decoder, is a decoding result output by the fourth weak measurement decoder, is an angle parameter; A processing module, configured to process the target information with noise amplified based on the weak measurement technique to obtain the target information.

4. An electronic device, comprising: The device comprises a processor, a memory, and a system bus; The processor and the memory are connected through the system bus; The memory is configured to store a program, the program comprising instructions which, when executed by the processor, cause the processor to perform the steps of the information processing method based on the weak measurement technique in any one of claims 1 to 2.

5. A computer readable storage medium, characterized in that, The computer readable storage medium is configured to store a computer program, the computer program being executed by a terminal device to implement the steps of the information processing method based on the weak measurement technique in any one of claims 1 to 2.

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