A quantum computer and method for optimizing quantum bit information reading

Abstract

The present invention provides a method, device, readable storage medium, and quantum computer for optimizing qubit information reading. The optimization method includes: performing a read operation on a qubit when it is in a first eigenstate and a second eigenstate, and obtaining the temporal relationship between the read information; based on the temporal relationship between the read information, obtaining the time-dependent relationship between the distinguishability of the first and second eigenstates of the qubit; and obtaining parameters for the qubit information reading operation based on the time-dependent relationship between the distinguishability and the time. The parameters include a sampling delay and / or a read width. The technical solution of the present invention improves the efficiency of determining the sampling delay and read width.

Description

Technical Field

[0001] The present invention belongs to the field of quantum computing technology, and in particular relates to an optimization method and device for reading quantum qubit information, and a quantum computer. Background Art

[0002] Quantum computing technology is rapidly developing, with an increasing number of quantum applications emerging and quantum hardware technology improving year by year. Reading qubit information is a crucial topic, typically achieved through dispersive reading.

[0003] The process of dispersion reading is as follows: a reading waveform is applied to the quantum bit, and a reading information acquisition operation is performed after a time t has passed since the start of the reading waveform application operation. The time t is called the sampling delay, and the duration of the reading information acquisition operation is called the reading width. The information of the quantum bit is obtained based on the read information.

[0004] In order to optimize the fidelity of quantum bit reading, it is necessary to optimize the sampling delay and reading width. The existing method for optimizing sampling delay and reading width is as follows: first, set the upper and lower bounds of the reading width, and continuously iterate within the upper and lower bounds according to the set step size to obtain multiple sets of fidelity values, and find the working point of the reading width with the highest fidelity. Then, under the working point of the reading width, continue to set the upper and lower bounds of the sampling delay, and continuously iterate within the upper and lower bounds according to the set step size to find the working point of the sampling delay with the highest fidelity, so as to determine the optimal working point of the reading width and sampling delay. As can be seen from the above description, the existing method for obtaining sampling delay and reading width requires two layers of iteration. If you want to get a higher test result, the step size of the traversed parameter value needs to be set smaller, resulting in a higher number of experiments. Therefore, this method is extremely inefficient. Therefore, it is necessary to propose an optimization method for quantum bit information reading.

[0005] It should be noted that the information disclosed in the background technology section of this application is only intended to deepen the understanding of the general background technology of this application, and should not be regarded as an admission or any form of implication that the information constitutes prior art already known to those skilled in the art. Summary of the Invention

[0006] The object of the present invention is to provide an optimization method, device and quantum computer for reading quantum bit information, wherein the optimization method is used to more efficiently determine the sampling delay and reading width.

[0007] To achieve the above objectives, in a first aspect, the present invention provides a method for optimizing quantum bit information reading, comprising:

[0008] Performing a read operation when a quantum bit is in a first eigenstate and a second eigenstate, respectively, and obtaining a relationship between the read information and time;

[0009] Based on the relationship between the read information and time, obtaining a corresponding relationship between the distinguishability of the first eigenstate and the second eigenstate of the quantum bit and time;

[0010] Parameters of a quantum bit information reading operation are obtained based on the corresponding relationship between the distinguishability and time, where the parameters include a sampling delay and / or a reading width.

[0011] Optionally, performing a read operation when a quantum bit is in a first eigenstate and a second eigenstate, respectively, includes:

[0012] A read waveform is applied and a read information acquisition operation is performed when the quantum bit is in the first eigenstate and the second eigenstate, respectively. The read information acquisition operation starts when the read waveform starts to be applied, and the time of the read information acquisition operation is not less than the time of the read waveform.

[0013] Optionally, performing a read operation when a quantum bit is in a first eigenstate and a second eigenstate and respectively obtaining a relationship between read information and time includes:

[0014] Applying a read waveform and performing a read information acquisition operation m times when the quantum bit is in a first eigenstate and a second eigenstate respectively;

[0015] Obtain the time-varying relationship of the read information in m first eigenstates and the time-varying relationship of the read information in m second eigenstates. The read information acquisition operation starts when the read waveform begins to be applied, and the time of the read information acquisition operation is not less than the time of the read waveform.

[0016] Optionally, obtaining the corresponding relationship between the distinguishability of the first eigenstate and the second eigenstate of the quantum bit and time based on the changing relationship between the read information and time includes:

[0017] Sampling the time-varying relationships of the read information in the m first eigenstates and the second eigenstates to obtain read information corresponding to different time points, and performing digital IQ demodulation on the read information corresponding to the different time points to obtain I component data and Q component data in the read information at the current time point;

[0018] Taking the average of m I component data or Q component data corresponding to a time point as the I component information or Q component information at that time point, obtaining the corresponding relationship between the I component information I0 and the Q component information Q0 in the first eigenstate and time, and the corresponding relationship between the I component information I1 and the Q component information Q1 in the second eigenstate and time;

[0019] The correspondence between the distinguishability and time is obtained based on the correspondence between I0, Q0, I1, Q1 and time.

[0020] Optionally, the acquiring the correspondence between the distinguishability and time based on the correspondence between I0, Q0, I1, Q1 and time includes:

[0021] For each time point, the following steps are performed: obtaining the distinguishability of the current time point based on the I component information and the Q component information of the first eigenstate and the I component information and the Q component information of the second eigenstate corresponding to the current time point;

[0022] Based on the acquired distinguishability at each time point, a corresponding relationship between the distinguishability and time is acquired.

[0023] Optionally, acquiring the distinguishability at the current time point based on the I component information and the Q component information in the first eigenstate and the I component information and the Q component information in the second eigenstate corresponding to the current time point includes:

[0024] Get the I0, Q0, I1, Q1 corresponding to the current time point, according to the formula Get the distinguishability Z at the current time point.

[0025] Optionally, before executing the acquisition of the correspondence between the distinguishability and time based on the correspondence between I0, Q0, I1, Q1 and time, the method further includes:

[0026] Smoothing is performed on the correspondence between I0, Q0, I1, Q1 and time.

[0027] Optionally, obtaining parameters of a quantum bit information reading operation based on the correspondence between the distinguishability and time includes:

[0028] According to Gaussian flat top formula:

[0029]

[0030] Fit the corresponding relationship between the distinguishability and time, where t is time, Z is the distinguishability, and τ c To read the width, the sampling delay is τ b +σ;

[0031] Parameters of a quantum bit information reading operation are obtained based on the fitting result, wherein the parameters include a sampling delay and / or a reading width.

[0032] Optionally, before executing the step of acquiring parameters for a quantum bit information reading operation based on the correspondence between the distinguishability and time, the step further includes:

[0033] The correspondence between the distinguishability and time is normalized.

[0034] In a second aspect, the present application provides an optimization device for reading quantum bit information, comprising:

[0035] A read information acquisition module, configured to perform a read operation when a quantum bit is in a first eigenstate and a second eigenstate, and to obtain a time-dependent relationship between the read information and the qubit;

[0036] A distinguishability acquisition module, configured to acquire a corresponding relationship between the distinguishability of the first eigenstate and the second eigenstate of the quantum bit and time based on a changing relationship between the read information and time;

[0037] A parameter acquisition module is used to obtain parameters of the quantum bit information reading operation based on the corresponding relationship between the distinguishability and time.

[0038] In a third aspect, the present application provides a readable storage medium on which a computer programmer is stored. When the computer program is executed, it can implement the optimization method for reading quantum bit information provided in the present application.

[0039] In a fourth aspect, the present application provides a quantum computer, including the optimization device for reading quantum bit information provided in the present application.

[0040] Compared with the existing technology, it has the following beneficial effects:

[0041] The optimization method for quantum bit information reading proposed in the present invention obtains the relationship between the reading information of the first eigenstate and the second eigenstate and the change in time, and then obtains the corresponding relationship between the distinguishability of the first eigenstate and the second eigenstate and time. According to the corresponding relationship between the distinguishability and time, the optimal sampling delay and reading width are obtained without iteration and with higher efficiency.

[0042] The device for optimizing quantum bit information reading, the readable storage medium, and the quantum computer proposed in the present invention belong to the same inventive concept as the method for optimizing quantum bit information reading provided in the present invention, and therefore have the same beneficial effects, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0044] Figure 1 1 is a flow chart of the optimization method for reading quantum bit information provided in one embodiment of the present application;

[0045] Figure 2 Schematic diagram of the correspondence between I0, Q0, I1, Q1 and sampling points in one embodiment of the present application;

[0046] Figure 3 Schematic diagram of the correspondence between distinguishability and sampling points in one embodiment of the present application. DETAILED DESCRIPTION

[0047] The following describes specific embodiments of the present invention in more detail with reference to schematic diagrams. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are greatly simplified and not to exact scale, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention.

[0048] In the description of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0050] An embodiment of the present invention provides an optimization method for reading quantum bit information, see Figure 1 , Figure 1 A schematic flow chart of the optimization method for reading quantum bit information provided in this embodiment, wherein the optimization method includes:

[0051] Step S1: performing a read operation when a quantum bit is in a first eigenstate and a second eigenstate, and obtaining a time-dependent relationship between the read information;

[0052] Step S2: Based on the relationship between the read information and time, obtaining a corresponding relationship between the distinguishability of the first eigenstate and the second eigenstate of the quantum bit and time;

[0053] Step S3: Based on the correspondence between the distinguishability and time, parameters of the quantum bit information reading operation are obtained, wherein the parameters include sampling delay and reading width.

[0054] In step S1, the qubit may be arranged on a quantum chip, and the qubit may be connected to other qubits on the quantum chip through capacitive coupling. The qubit is usually also coupled with an XY signal transmission line (or microwave drive line) and a Z signal transmission line (or flux bias line); the XY signal transmission line is used to transmit a drive signal, which can regulate the quantum state of the qubit, and the Z signal transmission line is used to transmit a flux control signal, which can regulate the frequency of the qubit.

[0055] Additionally, in step S1, the first eigenstate may be a |0> state, and the second eigenstate may be a |1> state. In other embodiments, the first eigenstate and the second eigenstate may also be quantum states at other energy levels.

[0056] In step S1, the read operation includes applying a read waveform and acquiring read information. The read waveform application operation specifically includes applying a read waveform to the resonant cavity coupled to the qubit. In this embodiment, the read waveform has a duration of 4000 nanoseconds. The read information acquisition operation specifically includes collecting a read feedback signal fed back from the resonant cavity. Therefore, the temporal relationship of the read information is the temporal relationship of the read feedback signal fed back from the resonant cavity.

[0057] In step S2, based on the relationship between the change of the read information when the quantum bit is in the |0> state and the |1> state respectively over time, the corresponding relationship between the distinguishability of the |0> state and the |1> state of the quantum bit and time is obtained. The distinguishability indicates the difficulty of distinguishing whether the quantum bit is in the |0> state or the |1> state. The higher the distinguishability, the easier it is to distinguish the quantum state of the quantum bit.

[0058] The sampling delay and reading width are explained here. During the dispersion reading process, a reading waveform is applied to the resonant cavity. After the start of the reading waveform application operation, the reading information acquisition operation is performed after a time t. The time t is called the sampling delay, and the duration of the reading information acquisition operation is called the reading width.

[0059] Generally, the sampling delay of the read operation in step S1 is set to 0, and the corresponding relationship between the distinguishability and time is obtained. Since the sampling delay is 0, the corresponding relationship between the distinguishability and time can represent the relationship between the differentiability and the sampling delay. Based on the relationship between the differentiability and time, the sampling delay that maximizes the differentiability can be obtained.

[0060] If the sampling delay of the reading operation in step S1 is t0, based on the correspondence between the distinguishability and time, the time point t1 at which the distinguishability is maximized can be obtained on the time axis. The distinguishability can be maximized by setting the sampling delay to (t0+t1).

[0061] In step S3, based on the correspondence between the distinguishability and time, the time length during which the distinguishability is maintained at a high level is obtained on the time axis, and the time length can be used as the reading width.

[0062] Compared with the prior art, the optimization method for reading quantum bit information in this embodiment does not require two iterations, and only one reading operation is required to obtain the sampling delay and reading width, which greatly improves the efficiency of determining the sampling delay and reading width compared with the prior art.

[0063] In step S1, the read information acquisition operation is performed when the read waveform begins to be applied, that is, the sampling delay of the read operation is 0, and the time of the read information acquisition operation is not less than the duration of the read waveform. In this embodiment, the read information acquisition operation is 4000ns, which is the same as the duration of the read waveform.

[0064] Specifically, in step S1, performing a reading operation when a quantum bit is in a first eigenstate and a second eigenstate and respectively obtaining a relationship between read information and time includes:

[0065] Applying a read waveform and performing a read information acquisition operation m times when the quantum bit is in a first eigenstate and a second eigenstate respectively;

[0066] Obtain the time-varying relationship of the read information in m first eigenstates and the time-varying relationship of the read information in m second eigenstates. The read information acquisition operation starts when the read waveform application ends, and the time of the read information acquisition operation is not less than the time of the read waveform.

[0067] In this embodiment, 5000 read operations are performed when the quantum bit is in the |0> state and the |1> state, and the relationship between the change of the read information and time is obtained respectively, that is, 5000 relationships between the change of the read information and time when the quantum bit is in the |0> state and 5000 relationships between the change of the read information and time when the quantum bit is in the |1> state are obtained.

[0068] Specifically, in step S2, obtaining the corresponding relationship between the distinguishability of the first eigenstate and the second eigenstate of the quantum bit and time based on the changing relationship between the read information and time includes:

[0069] Sampling the time-varying relationships of the read information in the m first eigenstates and the second eigenstates to obtain read information corresponding to different time points, and performing digital IQ demodulation on the read information corresponding to the different time points to obtain I component data and Q component data in the read information at the current time point;

[0070] Taking the average of m I component data or Q component data corresponding to a time point as the I component information or Q component information at that time point, obtaining the corresponding relationship between the I component information I0 and the Q component information Q0 in the first eigenstate and time, and the corresponding relationship between the I component information I1 and the Q component information Q1 in the second eigenstate and time;

[0071] The correspondence between the distinguishability and time is obtained based on the correspondence between I0, Q0, I1, Q1 and time.

[0072] In this embodiment, for the 5000 time-varying relationships between the read information obtained when the quantum bit is in the |0> state, sampling is performed for each time-varying relationship between the read information, with a sampling rate of 1.6 sampling points per nanosecond. Each sampling point corresponds to a time point. Therefore, there are 6400 sampling points for each time-varying relationship between the read information, that is, there are 6400 time points. Digital IQ demodulation is performed for each time point to obtain the I component data and Q component data in the read information at the current time point. The average value of the 5000 I component data corresponding to one time point is used as the I component information at the current time point, and a total of 6400 I component information at time points are obtained. Similarly, the average value of the 5000 Q component data corresponding to one time point is used as the Q component information at the current time point, and a total of 6400 Q component information at time points are obtained. In this way, the corresponding relationship between the I component information I0 and the Q component information Q0 and time when the quantum bit is in the |0> state is obtained.

[0073] The same method is used to obtain the correspondence between the I component information I1 and the Q component information Q1 and time when the quantum bit is in the |1> state.

[0074] See Figure 2 , Figure 2 Schematic diagram of the correspondence between I0, Q0, I1, Q1 and sampling points according to an embodiment of the present application, wherein the horizontal axis represents the sequence number of the sampling point, and the relationship can be converted into a correspondence with time according to the sampling rate.

[0075] Additionally, before executing the acquisition of the correspondence between the distinguishability and time based on the correspondence between I0, Q0, I1, Q1 and time, the method further includes:

[0076] The correspondence between I0, Q0, I1, Q1 and time is smoothed using a smooth algorithm. In this embodiment, the correspondence between I0, Q0, I1, Q1 and time is smoothed using a smooth algorithm in order to filter out noise items in the data.

[0077] Specifically, obtaining the correspondence between the distinguishability and time based on the correspondence between I0, Q0, I1, Q1 and time includes:

[0078] For each time point, the following steps are performed: obtaining the distinguishability of the current time point based on the I component information and the Q component information of the first eigenstate and the I component information and the Q component information of the second eigenstate corresponding to the current time point;

[0079] Specifically, obtaining the distinguishability at the current time point based on the I component information and the Q component information under the first eigenstate corresponding to the current time point and the I component information and the Q component information under the second eigenstate includes:

[0080] Get the I0, Q0, I1, Q1 corresponding to the current time point, according to the formula Get the distinguishability Z at the current time point.

[0081] Based on the obtained distinguishability of each time point, the corresponding relationship between the distinguishability and time is obtained, and the participants Figure 3 , Figure 3 Schematic diagram of the correspondence between distinguishability and sampling points according to an embodiment of the present application. Similarly, the sampling rate can be converted into the correspondence between distinguishability and time.

[0082] Specifically, the obtaining of parameters of a quantum bit information reading operation based on the correspondence between the distinguishability and time includes:

[0083] According to Gaussian flat top formula:

[0084]

[0085] Fit the corresponding relationship between the distinguishability and time, where t is time, Z is the distinguishability, and τ c is the reading width, and the sampling delay is τ b +σ;

[0086] Based on the fitting results, the parameters of the qubit information reading operation are obtained, including the sampling delay and / or the reading width. According to the fitting results, the sampling delay is obtained as 928ns, and the reading width is obtained as 3574ns.

[0087] Additionally, before executing the step of acquiring parameters for a quantum bit information reading operation based on the correspondence between the distinguishability and time, the method further includes:

[0088] The correspondence between the distinguishability and time is normalized.

[0089] In summary, this application provides a method for optimizing qubit information reading, comprising: performing a read operation on a qubit when it is in a first eigenstate and a second eigenstate, and obtaining a temporal relationship between the read information; obtaining a time-dependent relationship between the distinguishability of the first and second eigenstates of the qubit based on the temporal relationship between the read information; and obtaining parameters for the qubit information reading operation based on the temporal relationship between the distinguishability and the first and second eigenstates of the qubit. The parameters include a sampling delay and / or a read width. The technical solution of this embodiment can more efficiently determine the sampling delay and read width.

[0090] Based on the same inventive concept, the present application also provides an optimization device for reading quantum bit information, the optimization device comprising:

[0091] A read information acquisition module, configured to perform a read operation when a quantum bit is in a first eigenstate and a second eigenstate, and to obtain a time-dependent relationship between the read information and the qubit;

[0092] A distinguishability acquisition module, configured to acquire a corresponding relationship between the distinguishability of the first eigenstate and the second eigenstate of the quantum bit and time based on a changing relationship between the read information and time;

[0093] A parameter acquisition module is used to obtain parameters of the quantum bit information reading operation based on the corresponding relationship between the distinguishability and time.

[0094] Based on the same inventive concept, the present application also provides a readable storage medium on which a computer programmer is stored. When the computer program is executed, it can implement the optimization method for reading quantum bit information provided in an embodiment of the present application.

[0095] Based on the same inventive concept, the present application also provides a quantum computer, including the optimization device for reading quantum bit information provided in an embodiment of the present application.

[0096] The optimization device for quantum bit information reading, the readable storage medium, the quantum computer, and the optimization method for quantum bit information reading provided in this embodiment belong to the same inventive concept and therefore have the same beneficial effects, which will not be elaborated here.

[0097] The above description is only a description of the preferred embodiments of the present invention and does not limit the scope of the present invention. Any changes and modifications made by ordinary technicians in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A method for optimizing quantum bit information reading, characterized in that: include: Performing a read operation when a quantum bit is in a first eigenstate and a second eigenstate, respectively, and obtaining a relationship between the read information and time; Based on the relationship between the read information and time, obtaining a corresponding relationship between the distinguishability of the first eigenstate and the second eigenstate of the quantum bit and time; Parameters of a quantum bit information reading operation are obtained based on the corresponding relationship between the distinguishability and time, where the parameters include a sampling delay and / or a reading width.

2. The method for optimizing quantum bit information reading according to claim 1, wherein: The performing of a read operation when a quantum bit is in a first eigenstate and a second eigenstate respectively includes: A read waveform is applied and a read information acquisition operation is performed when the quantum bit is in the first eigenstate and the second eigenstate, respectively. The read information acquisition operation starts when the read waveform starts to be applied, and the time of the read information acquisition operation is not less than the time of the read waveform.

3. The method for optimizing quantum bit information reading according to claim 1, wherein: The method of performing a read operation when a quantum bit is in a first eigenstate and a second eigenstate and obtaining a relationship between read information and time, respectively, includes: Applying a read waveform and performing a read information acquisition operation m times when the quantum bit is in a first eigenstate and a second eigenstate respectively; Obtain the time-varying relationship of the read information in m first eigenstates and the time-varying relationship of the read information in m second eigenstates. The read information acquisition operation starts when the read waveform begins to be applied, and the time of the read information acquisition operation is not less than the time of the read waveform.

4. The method for optimizing quantum bit information reading according to claim 3, wherein: The obtaining, based on the changing relationship between the read information and time, a corresponding relationship between the distinguishability of the first eigenstate and the second eigenstate of the quantum bit and time, includes: Sampling the time-varying relationships of the read information in the m first eigenstates and the second eigenstates to obtain read information corresponding to different time points, and performing digital IQ demodulation on the read information corresponding to the different time points to obtain I component data and Q component data in the read information at the current time point; Taking the average of m I component data or Q component data corresponding to a time point as the I component information or Q component information at that time point, obtaining the corresponding relationship between the I component information I0 and the Q component information Q0 in the first eigenstate and time, and the corresponding relationship between the I component information I1 and the Q component information Q1 in the second eigenstate and time; The correspondence between the distinguishability and time is obtained based on the correspondence between I0, Q0, I1, Q1 and time.

5. The method for optimizing quantum bit information reading according to claim 4, wherein: The obtaining of the correspondence between the distinguishability and time based on the correspondence between I0, Q0, I1, Q1 and time includes: For each time point, the following steps are performed: obtaining the distinguishability of the current time point based on the I component information and the Q component information of the first eigenstate and the I component information and the Q component information of the second eigenstate corresponding to the current time point; Based on the acquired distinguishability at each time point, a corresponding relationship between the distinguishability and time is acquired.

6. The method for optimizing quantum bit information reading according to claim 5, wherein: The obtaining the distinguishability at the current time point based on the I component information and the Q component information under the first eigenstate corresponding to the current time point and the I component information and the Q component information under the second eigenstate includes: Get the I0, Q0, I1, Q1 corresponding to the current time point, according to the formula Get the distinguishability Z at the current time point.

7. The method for optimizing quantum bit information reading according to claim 4, wherein: Before executing the acquisition of the correspondence between the distinguishability and time based on the correspondence between I0, Q0, I1, Q1 and time, the method further includes: Smoothing is performed on the correspondence between I0, Q0, I1, Q1 and time.

8. The method for optimizing quantum bit information reading according to claim 6, wherein: The obtaining of parameters of a quantum bit information reading operation based on the correspondence between the distinguishability and time includes: According to Gaussian flat top formula: Fit the corresponding relationship between the distinguishability and time, where t is time, Z is the distinguishability, and τ c is the reading width, and the sampling delay is τ b +σ; Parameters of a quantum bit information reading operation are obtained based on the fitting result, wherein the parameters include a sampling delay and / or a reading width.

9. The method for optimizing quantum bit information reading according to claim 6, wherein: Before executing the step of obtaining parameters for a quantum bit information reading operation based on the correspondence between the distinguishability and time, the method further includes: The correspondence between the distinguishability and time is normalized.

10. An optimization device for quantum bit information reading, characterized in that: include: A read information acquisition module, configured to perform a read operation when a quantum bit is in a first eigenstate and a second eigenstate, and to obtain a time-dependent relationship between the read information and the qubit; A distinguishability acquisition module, configured to acquire a corresponding relationship between the distinguishability of the first eigenstate and the second eigenstate of the quantum bit and time based on a changing relationship between the read information and time; A parameter acquisition module is used to obtain parameters of the quantum bit information reading operation based on the corresponding relationship between the distinguishability and time.

11. A readable storage medium having stored thereon a computer programmer, characterized in that: When the computer program is executed, it can implement the optimization method for reading quantum bit information as described in claims 1 to 9.

12. A quantum computer, characterized in that: Including the optimization device for reading quantum bit information as described in claim 10.

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