50 results about "Quantum teleportation" patented technology

Disclosed is a method of establishing secure communications between nodes in a cloud environment. The method includes receiving a log-in of a first user, receiving a log-in of a second user and presenting to the first user one or more options to use a secure inter-user communication security service leveraging quantum teleportation in order to communication with the second user, wherein the secure inter-user communication security service optionally uses a quantum EPR processor (QEP). The one or more options include applying the secure inter-user communication security service using QEP to generate EPR Bell state pairs and applying security via quantum teleportation for communications between the first user and the second user and applying the secure inter-user communication security service to securely control communication between a first container associated with the first user and a second container associated with the second user and associated daemons leveraging the QEP.

A control system for a network of quantum systems operates the network to perform quantum informatics processing. The control system includes an entanglement scheduler configured to identify operations for which entanglement of two or more of the quantum systems is desired, identify plural potential entanglement attempts for generating the entanglement; and schedule at least some of the potential entanglement attempts to be performed to generate the entanglement for at least one of the operations. The entanglement scheduler may use direct entanglement, entanglement swapping and / or quantum teleportation approaches to generate the entanglement. The entanglement scheduler may schedule probabilistic entanglement attempts based at least in part on the probability of success of the entanglement attempts. The entanglement scheduler may generate entanglement to support plural branches of a quantum informatics process and / or to respond to events occurring while the quantum informatics process is executing.

The invention belongs to the technical field of quantum information, and particularly relates to a quantum entanglement and classical signal common-fiber transmission device based on a hollow-core optical fiber. According to the device, the characteristics of low loss and weak non-linear effect of the hollow-core optical fiber are utilized, the quantum entanglement two-photon pair and the classical optical signal are transmitted in the hollow-core optical fiber in a co-fiber mode through the wavelength division multiplexing technology and the polarization optimization strategy, the system can tolerate the classical signal with the higher communication rate, and the lower quantum signal bit error rate is allowed. The quantum entanglement and classical signal common-fiber transmission device designed through the method can be widely applied to the fields of quantum key distribution, quantum teleportation, quantum clock synchronization, distributed quantum calculation and the like compatible with a classical optical fiber communication system.

The invention discloses a quantum random number secure generation method and device based on quantum entanglement and a medium, and relates to the technical field of quantum information. According to the method, quantum entanglement and quantum teleportation protocols are combined, and the VN algorithm is introduced to improve the security of the quantum random number generation process. According to the method, the randomness, the security and the quantum attack resistance of the random number generator can be improved by utilizing the unpredictability of the quantum state and the non-locality of quantum entanglement, so that higher information security requirements are met.

Quantum teleportation is essential for many quantum information technologies, including long-distance quantum networks. Using fiber-coupled devices, including state-of-the-art low-noise superconducting nanowire single-photon detectors and off-the-shelf optics, we achieve conditional quantum teleportation of time-bin qubits at the telecommunication wavelength of 1536.5 nm. We measure teleportation fidelities of ≥90% that are consistent with an analytical model of our system, which includes realistic imperfections. To demonstrate the compatibility of our setup with deployed quantum networks, we teleport qubits over 22 km of single-mode fiber while transmitting qubits over an additional 22 km of fiber. Our systems, which are compatible with emerging solid-state quantum devices, provide a realistic foundation for a high-fidelity quantum Internet with practical devices.

The invention discloses a financial-level secure transmission system based on quantum encryption communication, and the system comprises a terminal quantum key distribution module, a cloud trusted node cluster, and a dynamic key agreement protocol engine. The terminal quantum key distribution module, the cloud trusted node cluster and the dynamic key agreement protocol engine are used for generating a shared key of anti-quantum computing through quantum key division, and realizing end-to-end encrypted transmission of a transaction instruction between a terminal and a cloud; according to the invention, by constructing a quantum key dynamic distribution and hybrid encryption system and creatively fusing quantum teleportation and trusted execution environment technologies, the performance bottleneck of an existing quantum communication system in a financial scene is broken through, and end-to-end secure transmission resisting quantum computing attack is realized.

Quantum teleportation is essential for many quantum information technologies, including long-distance quantum networks. Using fiber-coupled devices, including state-of-the-art low-noise superconducting nanowire single-photon detectors and off-the-shelf optics, we achieve conditional quantum teleportation of time-bin qubits at the telecommunication wavelength of 1536.5 nm. We measure teleportation fidelities of ≥9% that are consistent with an analytical model of our system, which includes realistic imperfections. To demonstrate the compatibility of our setup with deployed quantum networks, we teleport qubits over 22 km of single-mode fiber while transmitting qubits over an additional 22 km of fiber. Our systems, which are compatible with emerging solid-state quantum devices, provide a realistic foundation for a high-fidelity quantum Internet with practical devices.

The invention discloses a continuous variable quantum repeater communication protocol and a design method thereof, an error correction module is used to carry out error correction on a pure loss link between a sender Alice and a receiver Bob, two adjacent loss links are connected through a quantum repeater node, and one mode in a dual-mode compressed Gaussian state is transmitted from the sender Alice to the receiver Bob. According to the module, quantum teleportation and a noiseless linear amplifier are combined, and the communication performance is improved by introducing thermal noise and a multiplexing method according to the improved scheme. The CVQR protocol has significant advantages in the aspect of key rate under collective attacks, and the proposed CVQR protocol paves a way for implementation of long-distance CV-QKD.

Aspects of the subject disclosure may include, for example, identifying a request to facilitate communications between first and second processing nodes, determining that the communications are to be established via quantum teleportation between, and identifying a network path comprising a first path segment to obtain a quantum channel, wherein quantum entanglement is established between the first and second processing nodes based on transportation of a first quantum entangled object via the quantum channel. A classical communication channel is facilitated between the first and second processing nodes, adapted to exchange between the nodes, quantum state information of a measurement performed upon the first quantum entangled object. Information is exchanged between the first and second processing nodes via the quantum channel according to the transported first quantum entangled object and the exchanged quantum state information. Other embodiments are disclosed.

The invention discloses an electric power system quantum electromagnetic transient simulation method with a high quantum state utilization rate. The electric power system quantum electromagnetic transient simulation method comprises the following steps: S1, solving an electric quantity of an electric power system through quantum calculation; s2, transmission of action information of a control switch in a single simulation step length and quantum state transmission of a step length are realized through quantum stealth transmission; s3, through a multi-path parallel step length simulation quantum state providing method, parallel calculation is carried out to sequentially provide simulation quantum states with the difference of one step length; s4, constructing a quantum analysis circuit to extract electrical quantity characteristic information of the key node according to a stride length simulation quantum state in the time window; and S5, realizing long-time-consumption quantum computing task error suppression based on quantum teleportation by adopting a segmented quantum computing relay architecture. According to the method, the problem of low quantum electromagnetic transient simulation calculation efficiency caused by low quantum state utilization rate is solved aiming at the phenomenon of reading out a multi-step quantum state after quantum-classical information interaction and simulation in calculation.

Quantum teleportation is essential for many quantum information technologies, including long-distance quantum networks. We realize conditional quantum teleportation of time-binned qubits at a telecommunication wavelength of 1536.5 nm using a fiber-coupled device including state-of-the-art low-noise superconducting nanowire single-photon detectors and commercially available optics. We measure teleportation fidelity better than 90%, consistent with an analytical model of our system including realistic imperfections. To demonstrate the compatibility of our setup with deployed quantum networks, we teleported a qubit over 22 km of single-mode fiber while transmitting the qubit over another 22 km of fiber. Our system is compatible with emerging solid-state quantum devices and provides a realistic foundation for a high-fidelity quantum internet using practical devices.

The application discloses a kind of machine room equipment intelligent remote operation and maintenance method and platform, it is related to intelligent operation and maintenance technical field, including, construct bayesian probability model, and combine optical signal characteristics and current harmonic characteristics, predict the failure probability distribution of machine room equipment;According to the failure probability distribution of machine room equipment, convert fault coordinates into equipment logical identifier, and detect the quantum teleportation link of machine room equipment, generate machine room equipment switching instruction according to detection result;According to machine room equipment switching instruction, send Bell state measurement command to fault equipment, and carry out quantum state reconstruction and machine room equipment switching.The application constructs multilayer bayesian probability model based on Gaussian distribution, Granger causality test and variational inference, realizes the nonlinear correlation analysis of optical signal wavelength shift and current harmonic characteristics, can accurately capture the weak signs of potential equipment failure, to significantly improve the sensitivity and reliability of failure prediction.

The invention discloses an asymmetric bidirectional controlled quantum teleportation method based on an eight-quantum cluster state, and the method comprises the steps: constructing an eight-quantum-bit cluster state as a quantum channel, and distributing channel quantum bits; executing a CNOT operation on the target quantum bits of the first communication party and the second communication party; respectively entangling the temporary target states of the first communication party and the second communication party with respective channel quantum bits by using a CNOT operation; the first communication party and the second communication party execute single quantum bit measurement and disclose a measurement result through a classical channel; the third control party executes single quantum bit measurement and discloses a measurement result through a classical channel; and the first communication party and the second communication party execute unitary transformation and reconstruct the target quantum state. According to the method, the eight-quantum-cluster state is used as a quantum channel, the safety is effectively improved, quantum resource consumption is relatively low, a third party is introduced to control information transmission, CNOT operation and single-quantum-bit measurement are used for replacing a GHZ state measurement base, and higher feasibility and practicability are achieved.

The invention provides a controlled bidirectional remote transmission method of any quantum state, and relates to the technical field of quantum communication. According to the invention, a control party David and communication parties Alice, Bob and Candy are introduced to construct a cooperative communication system, and the three communication parties all have receiving and transmitting bidirectional functions, so that the limitation of traditional one-way transmission is broken. Two core communication paradigms of quantum invisible transmission and remote state preparation are creatively fused, a maximum entanglement state sharing mechanism is constructed between a communication party and a control party, and bidirectional interactive transmission of quantum information is realized under cooperative regulation and control of the control party: Alice can invisibly transmit any single-bit state and two-bit state to Bob and Candy respectively, and Alice can invisibly transmit any single-bit state and two-bit state to Bob and Candy respectively; at the same time, Bob and Candy can also be used for jointly and remotely preparing any two bit states for Alice. In a transmission process, a receiver can perfectly reconstruct a target quantum state through a series of quantum measurement and unitary transformation operations, so that deterministic bidirectional hybrid transmission of quantum information is achieved. According to the technical scheme, organic fusion of two quantum communication modes is achieved, a multi-node collaborative quantum information interaction architecture is constructed, a core technology foundation is laid for constructing an efficient and flexible quantum communication network, and the application potential of quantum information transmission is remarkably improved.

The present invention discloses a continuous variable bidirectional quantum teleportation device, comprising an interconnected entangled source, an input optical path, and an output optical path. The input optical path and the output optical path of the scheme both comprise a beam splitter with an adjustable splitting ratio, two beam splitters, two balanced zero-beat detectors, an amplitude modulator, and a phase modulator. The beam splitter with an adjustable splitting ratio is connected to the EPR entangled source, the two balanced zero-beat detectors of the input optical path are respectively connected to the amplitude modulator and the phase modulator of the output optical path, and the two balanced zero-beat detectors of the output optical path are respectively connected to the amplitude modulator and the phase modulator of the input optical path. The continuous variable bidirectional quantum teleportation scheme provided by the present invention can realize a bidirectional teleportation process under a pair of EPR entangled lights. Using this scheme to construct a quantum network and quantum conference can significantly increase the number of users that can be carried in the network and conference under fixed entangled resources.

The invention discloses a microwave continuous variable quantum teleportation method, which comprises the following steps that: a third party adopts a Josephh parametric amplifier and a microwave beam splitter to generate a dual-mode compression state in a set low-temperature environment, and sends the dual-mode compression state to a communication sender and a communication receiver; after receiving the signal, the communication sender performs Bell measurement to generate a feed-forward signal, and sends the feed-forward signal to the communication receiver; and the communication receiver processes the signal sent by the third party according to the received feedforward signal to obtain the quantum state sent by the communication sender, and microwave continuous variable quantum teleportation is completed. The invention also discloses a system for realizing the microwave continuous variable quantum teleportation method. Through the innovative design of the continuous variable quantum teleportation scheme and the innovative signal processing mode, microwave continuous variable quantum teleportation is achieved, reliability is better, and accuracy is better.

The invention discloses an asymmetric # imgabs0 # bidirectional quantum teleportation method based on a seven-quantum entanglement state. The method comprises the following steps: initially preparing a seven-quantum-bit entanglement state from seven single-quantum-bit pure states; distributing the seven quantum bit particles in the entangled state to a first communication party and a second communication party; the first communication party and the second communication party respectively execute CNOT operation on respective target quantum particles to concentrate target quantum state information; respectively carrying out Bell state base measurement on entanglement particles owned by the first communication party and the second communication party, and respectively transmitting measurement results to the other communication party through a classic channel; and respectively executing recovery operation according to the received measurement results, and reconstructing a target quantum state transmitted by the other communication party. According to the method, two-way invisible transmission of an unknown two-quantum-bit entangled state and an unknown three-quantum-bit entangled state between two communication parties is realized, fewer classical and quantum resources need to be consumed in the realization process, the execution difficulty is lower, and the communication efficiency is higher.

A modular quantum computing system that enables distributed quantum computation across multiple quantum processing units (QPUs) that are remotely connected using a quantum entanglement network is disclosed. In order to execute a quantum circuit across multiple QPUs, any quantum state pertaining to any given multi-qubit gate of the quantum circuit may be teleported between two respective QPUs, such that an overall quantum compute capacity for executing the quantum circuit is expanded. Based on a number of QPUs that are allocated for executing the quantum circuit, buffers of established, pairwise quantum entanglement instances between respective sets of the allocated QPUs may be prepared and subsequently maintained prior to and during execution of the quantum circuit, in order to limit potential latency due to use of a quantum entanglement network within the execution of a given quantum circuit.

The invention discloses an experimental device for simulating quantum entangled state measurement and quantum teleportation by using a classical light source, which comprises the following steps: after a first light beam is emitted by an entangled light source simulation module through a laser light source, carrying out polarization and beam splitting treatment to generate two polarized light paths for simulating spatially separated entangled photon pairs; a second light beam is emitted by a laser light source through a simulated unknown quantum state generation module and then is subjected to polarization and beam splitting processing, two second polarized light beams which are used for simulating generation of unknown quantum states and are orthogonal in polarization direction and equal in intensity are generated, and polarized light beams output by an Alice end, a Bob end and a Cindy end are measured respectively. The light intensity data of the polarized light beam under a plurality of preset measurement bases are measured, the light intensity data are converted into coincidence counts in combination with a preset counting rule, the light path configuration of quantum entangled state measurement and quantum teleportation is determined according to the coincidence counts, and the experimental device has good stability and repeatability.

A method performed by Charlie in a quantum communication system, according to one embodiment of the present disclosure, may comprise the steps of: forming a first Bell-state resource between a first qubit and a qubit included in Alice; forming a second Bell-state resource between a second qubit and a qubit included in Bob; transforming, into a first Greenberger-Horne-Zeilinger (GHZ) state, a three-qubit state from among the second qubit, a third qubit, and the qubit included in Bob; performing a Bell-state measurement between the first qubit and the second qubit; transforming, on the basis of the Bell-state measurement performing result, a three-qubit state from among the third qubit, the qubit included in Alice, and the qubit included in Bob into a second GHZ state, and performing entanglement teleportation by using the second GHZ state as a resource.

The invention relates to the technical field of quantum communication, and discloses a method for bidirectionally, controllably, symmetrically and invisibly transmitting two three-quantum-bit target quantum states based on a nine-quantum-bit entangled channel. According to the method, a quantum channel is constructed by using nine-quantum-bit entanglement resources, so that controllable symmetric invisible transmission of two unknown three-quantum-bit exclusive target states is realized, and quantum measurement used in the implementation process only comprises single-quantum-bit measurement and Bell state measurement. The used quantum operation only comprises single quantum bit bubble operation and two quantum bit gate operation, the measurement and operation are realized in a quantum experiment, and the bidirectional controllable quantum teleportation method provided by the invention is large in information capacity, high in transmission efficiency, low in execution difficulty and high in feasibility and practicability.

A system includes N-distant independent plasmonic graphene waveguides. The N-distant independent plasmonic graphene waveguides are used to generate an N-partite continuous variable entangled state.

The invention discloses a quantum teleportation system and a quantum teleportation method based on the quantum teleportation system, and belongs to the field of quantum communication.The quantum teleportation system comprises the steps that a quantum entanglement light source generates quantum entanglement photons and sends the quantum entanglement photons to a wavelength demultiplexing and multiplexing device; the wavelength demultiplexing and multiplexing device performs wavelength demultiplexing on the quantum entangled photons to obtain a plurality of quantum entangled photon pairs, and sends the quantum entangled photon pairs to the plurality of terminal measurement devices through wavelength division multiplexing; any target terminal measurement device prepares a target single photon polarization state to be transmitted, combines the target single photon polarization state with the obtained target quantum entanglement photons to generate a response result, and sends the response result to the opposite terminal measurement device; and the opposite-end terminal measuring device obtains a response result, and updates the current single-photon polarization state to the target single-photon polarization state based on the response result. According to the invention, the problem that quantum teleportation can only be carried out in a point-to-point manner in a current quantum teleportation experiment is solved.

The application discloses a kind of quantum teleportation methods based on atom-photon entanglement: step 1: Alice and Bob prepare the atom sequence of different initial state.Step 2: Alice generates reference light pulse and signal light pulse, and is transmitted in channel by time division multiplexing.Step 3: Alice manipulates signal light pulse and atom interaction to produce entangled state, and after transmission by quantum channel, coherent light and the atom of Bob establish entanglement, to complete three-particle entanglement.Step 4: Alice divides atom sequence, and Bob carries out channel security detection.Step 5: after channel security, Alice encodes secret information on information sequence atom and publishes measurement result.Step 6: Alice does Hadamard gate operation to the atom sequence carrying information.Step 7: Bob demodulates secret information.The application makes full use of long decoherence time atom-photon entanglement resources, meets the communication demand of high channel capacity and high link efficiency, and provides a feasible way for constructing large-scale, loss-resistant quantum internet.

The invention belongs to the technical field of quantum information science, and particularly relates to a duplex quantum teleportation device. The system comprises a first user node, a second user node and a server node, the user node is provided with a quantum information sending module and a quantum information receiving module, the quantum information sending module is used for quantum information, and the quantum information receiving module recovers a transmitted quantum state according to a Bell state measurement result. The server node receives quantum information sent by the user node and performs Bell state measurement, records and sends each Bell state measurement event to the user node, and distributes signal photons corresponding to idle frequency photons to the user node; and the user node correspondingly transforms the received signal photons according to the Bell state measurement result to obtain the quantum state sent by the opposite party, thereby realizing duplex quantum teleportation. According to the invention, quantum stealth transmission in two directions can be realized at the same time under the condition of not increasing extra quantum channels.

This invention relates to quantum teleportation, specifically to a quantum teleportation system and method based on two-photon polarization-path entanglement, comprising a polarization entanglement source, an Alice end, and a Bob end; the polarization entanglement source is used to generate a pair of polarization-entangled photons; the Alice end receives the first polarization-entangled photon from the pair and performs initial path-transfer state preparation and polarization-path joint Bell state detection on it; the Bob end receives the second polarization-entangled photon from the pair and performs unitary operation and single-photon state tomography on it to reconstruct the transferred quantum state; the technical solution provided by this invention can effectively overcome the shortcomings of existing technologies, such as complex optical paths, high implementation costs, and limited application scope.

The application discloses a kind of method for realizing distributed quantum amplitude amplification and related equipment, method includes: the initial success probability of quantum state is quantified based on target unitary operator, and configuration unitary operator is obtained from target unitary operator based on division parameter;Based on division parameter, Boolean function is split into the subfunction of preset quantity and sequentially distributed to each quantum node;Based on configuration unitary operator, the probability upper limit value of each quantum node is quantified using amplitude estimation;According to probability upper limit value, iteration number is obtained, and according to initial success probability, iteration upper limit is obtained;Based on iteration number, the measurement string corresponding to quantum node is iteratively output by quantum amplitude amplification algorithm, and then target string is verified and determined;Quantum operation result is obtained by summarizing the target string corresponding to all quantum nodes.The application can effectively avoid the dependence of existing distributed quantum computation on quantum communication means such as quantum teleportation, and can be widely applied in the field of data processing.

An embodiment uses entanglement and quantum teleportation to build a quantum backbone network. A network interface interconnects packetized quantum networks with entanglement-based quantum backbone networks.

The invention discloses an intelligent remote operation and maintenance method and platform for machine room equipment, and relates to the technical field of intelligent operation and maintenance, and the method comprises the steps: constructing a Bayesian probability model, and predicting the fault probability distribution of the machine room equipment in combination with optical signal features and current harmonic features; according to the fault probability distribution of the machine room equipment, converting the fault coordinate into an equipment logic identifier, detecting a quantum invisible state transmission link of the machine room equipment, and generating a machine room equipment switching instruction according to a detection result; and sending a Bell state measurement command to the fault equipment according to the machine room equipment switching instruction, and performing quantum state reconstruction and machine room equipment switching. According to the method, the multi-layer Bayesian probability model based on Gaussian distribution, Granger causal test and variational inference is constructed, nonlinear correlation analysis of optical signal wavelength shift and current harmonic characteristics is achieved, weak symptoms of potential faults of equipment can be accurately captured, and therefore the sensitivity and reliability of fault prediction are remarkably improved.

The present invention provides a method for sharing maximum entangled states in an amplitude-damped channel based on coherence compensation, which relates to the field of quantum communication. Specifically, the distributor Alice prepares a maximum entangled Bell state based on single-particle A and single-particle T, and sends single-particle T to the receiver Bob via an amplitude-damped channel; the receiver Bob performs a quantum controlled NOT gate operation on the prepared single-particle B and the received single-particle T, and then sends single-particle T to the distributor Alice via an amplitude-damped channel; the distributor Alice performs a joint unitary operation on single-particle A and single-particle T, and then performs a single-particle Z-basis measurement on single-particle T, thereby achieving maximum entangled Bell state sharing between two parties in the amplitude-damped channel. This method is also applicable to maximum entangled GHZ state sharing between multiple parties in an amplitude-damped channel. The present invention adopts a coherence compensation mechanism to effectively suppress amplitude damping noise, thereby improving the fidelity of quantum teleportation and multi-party quantum state sharing.