Compensation method and device for XY crosstalk of quantum bit, and quantum computer

Abstract

The invention discloses a quantum bit XY crosstalk compensation method and device, and a quantum computer. The method comprises the following steps: firstly, obtaining a first waveform of a quantum state control signal of a target quantum bit; then obtaining a second waveform of the quantum state control signal of each interference quantum bit; and finally, acquiring a compensation signal waveform corresponding to each sub-waveform, and updating the first waveform in a time sequence based on all the acquired compensation signal waveforms. The compensation signal waveform of the crosstalk influence caused by the quantum state control signal of each interference quantum bit is obtained, and all the compensation waveforms are combined with the original first waveform of the target quantum bit, so that the XY crosstalk problem of the quantum bits caused by all the interference quantum bits can be effectively eliminated; and the blank in the prior art is filled. By means of the scheme, the probability of errors occurring when the quantum computer executes the quantum computing task is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the field of quantum computing technology, and in particular to a method and device for compensating XY crosstalk of a quantum bit, and a quantum computer. Background Art

[0002] Quantum computing and quantum information is an interdisciplinary subject based on the principles of quantum mechanics to achieve computing and information processing tasks. It has a very close connection with quantum physics, computer science, informatics and other disciplines, and has developed rapidly in the past two decades. Quantum algorithms based on quantum computers in scenarios such as factorization and unstructured search have shown performance far beyond the existing algorithms based on classical computers, and this direction has also been expected to exceed existing computing capabilities. Since quantum computing has the potential to far exceed the performance of classical computers in solving specific problems, in order to realize a quantum computer, it is necessary to obtain a quantum chip that contains a sufficient number and quality of quantum bits, and can perform quantum logic gate operations and read quantum bits with extremely high fidelity.

[0003] The quantum chip is to the quantum computer what the CPU is to the traditional computer. The quantum chip is the core component of the quantum computer. The quantum chip is the processor that performs quantum computing. The quantum chip integrates multiple one-to-one and mutually coupled quantum bits and reading cavities. Each quantum chip needs to be tested and characterized before it is officially put into use. The quantum computer also includes a measurement and control system that provides a measurement and control environment for the quantum chip. The measurement and control system mainly includes hardware equipment located in the room temperature layer and low-temperature devices and signal transmission lines located in the dilution refrigerator. After the quantum chip is packaged, it is fixed in the extremely low temperature layer of the bottom layer of the dilution refrigerator, and finally connected to the hardware equipment at room temperature through the coaxial line between the layers. In this measurement and control system, when regulating the quantum state of the quantum bit, two types of lines are mainly used. One is the first type of transmission line (also known as the quantum state control line, XY line) used to drive the quantum state of the quantum bit, and the other is the second type of transmission line (also known as the frequency control line, Z line) used to regulate the frequency of the quantum bit. The signal transmitted on the quantum state control line is called the quantum state control signal, and the signal transmitted on the frequency control line is called the frequency control signal. In a quantum chip, the quantum state control signal of a quantum bit will be affected by the quantum state control signal of an adjacent quantum bit. For example, when an X-gate signal is applied to the quantum state control line of the first quantum bit, a quantum state control signal is also applied to the quantum state control line of the second quantum bit adjacent to the quantum bit. Due to the existence of this influence, the first quantum bit that should have been excited to the |1> state by the X-gate signal will still be in the ground state or excited to a higher quantum state. We generally call this phenomenon XY crosstalk. If this crosstalk effect is ignored and no treatment is done, serious errors will occur in quantum computing tasks.

[0004] Therefore, proposing a solution that can effectively solve the XY crosstalk of quantum bits has become an urgent issue in this field.

[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 suggestion in any form 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 a method and device for compensating XY crosstalk of quantum bits, and a quantum computer, so as to solve the problem that there is a lack of an effective solution to the XY crosstalk of quantum bits in the prior art.

[0007] In order to solve the above technical problems, the present invention proposes a method for compensating XY crosstalk of a quantum bit, comprising:

[0008] Acquire a first waveform of a quantum state control signal of a target quantum bit;

[0009] Acquire a second waveform of the quantum state control signal of each interfering quantum bit, wherein the second waveform includes a plurality of sub-waveforms, and the interfering quantum bit is a quantum bit that has a crosstalk effect on the quantum state control signal of the target quantum bit in the quantum chip;

[0010] Obtaining a compensation signal waveform corresponding to each sub-waveform, wherein the compensation signal waveform is a waveform of a signal applied to the target quantum bit for compensating for the crosstalk effect caused by the sub-waveform on the target quantum bit;

[0011] The first waveform is updated in time sequence based on all the acquired compensation signal waveforms.

[0012] Optionally, the compensation signal waveform is obtained by:

[0013] When a sub-waveform of the second waveform is applied to the crosstalk qubit, and an X-gate signal is applied to the target qubit, a first change in the probability of the target qubit being in a first eigenstate as a function of the amplitude and phase of the compensation signal waveform is obtained;

[0014] An amplitude and a phase satisfying a preset condition are acquired based on the first change condition, and the compensation signal waveform is determined based on the acquired amplitude and phase.

[0015] Optionally, the frequency of the compensation signal waveform is determined by the frequency of the corresponding sub-waveform.

[0016] Optionally, the acquiring an amplitude and a phase satisfying a preset condition based on the first change condition includes:

[0017] Acquire an extreme value point of the probability that the target quantum bit is in a first eigenstate based on the first change situation;

[0018] Obtain the amplitude and phase corresponding to the extreme point.

[0019] Optionally, determining the compensation signal waveform by using the acquired amplitude and phase includes:

[0020] Acquire the envelope of the compensation signal waveform based on the acquired amplitude and phase;

[0021] The compensation signal waveform is acquired based on the envelope.

[0022] Optionally, updating the first waveform in time sequence based on all acquired compensation signal waveforms includes:

[0023] All acquired compensation signal waveforms are merged into the first waveform to update the first waveform, wherein the position of each compensation signal waveform in the timing diagram is the same as the position of the corresponding sub-waveform in the timing diagram.

[0024] Based on the same inventive concept, the present invention also proposes a device for compensating XY crosstalk of a quantum bit, comprising:

[0025] A first waveform acquisition unit, used to acquire a first waveform of a quantum state control signal of a target quantum bit;

[0026] A second waveform acquisition unit, used to acquire a second waveform of the quantum state control signal of each interfering quantum bit, wherein the second waveform includes a plurality of sub-waveforms, and the interfering quantum bit is a quantum bit that has a crosstalk effect on the quantum state control signal of the target quantum bit in the quantum chip;

[0027] A compensation waveform acquisition unit, used to acquire a compensation signal waveform corresponding to each sub-waveform, wherein the compensation signal waveform is a waveform of a signal applied to the target quantum bit to compensate for the crosstalk effect caused by the sub-waveform on the target quantum bit;

[0028] The first waveform updating unit is used to update the first waveform in time sequence based on all the acquired compensation signal waveforms.

[0029] Based on the same inventive concept, the present invention also proposes a quantum computing measurement and control system, which utilizes the XY crosstalk compensation method of the quantum bit described in any one of the above-mentioned characteristic descriptions, or includes the XY crosstalk compensation device of the quantum bit described in the above-mentioned characteristic descriptions.

[0030] Based on the same inventive concept, the present invention also proposes a quantum computer, including the quantum computing measurement and control system described in the above feature description.

[0031] Based on the same inventive concept, the present invention also proposes a readable storage medium having a computer program stored thereon, which, when executed by a processor, can implement the method for compensating the XY crosstalk of a quantum bit described in any one of the above-mentioned feature descriptions.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] The present invention proposes a method for compensating the XY crosstalk of a quantum bit. First, the first waveform of the quantum state control signal of the target quantum bit is obtained; then the second waveform of the quantum state control signal of each interfering quantum bit is obtained. Finally, the compensation signal waveform corresponding to each sub-waveform is obtained, and the first waveform is updated in time sequence based on all the obtained compensation signal waveforms. By respectively obtaining the compensation signal waveforms of the crosstalk caused by the quantum state control signal of each interfering quantum bit, and merging all the compensation waveforms with the original first waveform of the target quantum bit, the XY crosstalk problem of the quantum bit caused by all interfering quantum bits can be effectively eliminated, filling the gap in the prior art. Using the solution of the present application, the probability of errors in quantum computers when performing quantum computing tasks is effectively reduced.

[0034] The quantum bit XY crosstalk compensation device, quantum computing measurement and control system, quantum computer and readable storage medium proposed in the present invention belong to the same inventive concept as the quantum bit XY crosstalk compensation method, and therefore have the same beneficial effects, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic flow chart of a method for compensating XY crosstalk of a quantum bit proposed in an embodiment of the present invention;

[0036] Figure 2 is a timing diagram of an initial waveform of a quantum state control signal applied to a quantum state control line shown in an embodiment of the present invention;

[0037] Figure 3 is a timing diagram of the compensation signal waveform for quantum bit Q2;

[0038] Figure 4 is a timing diagram of the compensation signal waveform for quantum bit Q3;

[0039] Figure 5 It is a timing diagram after the compensation signal waveform of quantum bits Q2 and Q3 is combined with the quantum state control signal of quantum bit Q1;

[0040] Figure 6 A schematic diagram of the structure of a device for compensating XY crosstalk of a quantum bit proposed in another embodiment of the present invention. DETAILED DESCRIPTION

[0041] The specific implementation of the present invention will be described in more detail below in conjunction with the schematic diagram. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and are not in exact proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0042] In the description of the present invention, it is necessary to understand that the terms "center", "up", "down", "left", "right", etc. indicate directions or positional relationships 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.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] Please refer to Figure 1 , an embodiment of the present invention proposes a method for compensating XY crosstalk of a quantum bit, comprising:

[0045] S100: Acquire a first waveform of a quantum state control signal of a target quantum bit;

[0046] S200: Acquire a second waveform of a quantum state control signal of each interfering quantum bit, wherein the second waveform includes a plurality of sub-waveforms, and the interfering quantum bit is a quantum bit that has a crosstalk effect on the quantum state control signal of the target quantum bit in the quantum chip;

[0047] S300: Obtaining a compensation signal waveform corresponding to each sub-waveform, wherein the compensation signal waveform is a waveform of a signal applied to the target quantum bit for compensating for the crosstalk effect caused by the sub-waveform on the target quantum bit;

[0048] S400: updating the first waveform in time sequence based on all acquired compensation signal waveforms.

[0049] The difference from the prior art is that the embodiment of the present invention proposes a method for compensating the XY crosstalk of a quantum bit. First, the first waveform of the quantum state control signal of the target quantum bit is obtained; then the second waveform of the quantum state control signal of each interfering quantum bit is obtained. Finally, the compensation signal waveform corresponding to each sub-waveform is obtained, and the first waveform is updated in time sequence based on all the obtained compensation signal waveforms. By respectively obtaining the compensation signal waveforms of the crosstalk caused by the quantum state control signal of each interfering quantum bit, and merging all the compensation waveforms with the original first waveform of the target quantum bit, the XY crosstalk problem of the quantum bit caused by all interfering quantum bits can be effectively eliminated, filling the gap in the prior art. Using the solution of the present application, the probability of errors in quantum computers when performing quantum computing tasks is effectively reduced.

[0050] Please refer to Figure 2-Figure 5 , assuming that quantum bit Q1 is the target quantum bit, and quantum bit Q2 and quantum bit Q3 are interfering quantum bits that produce crosstalk effects on quantum bit Q1. Figure 2 Shown in FIG. 1 is a timing diagram of the initial waveforms of the quantum state control signals applied to the quantum state control lines of each of the three quantum bits.

[0051] from Figure 2 It can be seen that the quantum state control signal of quantum bit Q2 has two sub-waveforms. We can define the first sub-waveform of the quantum state control signal of quantum bit Q2 as the first sub-waveform, and define the second sub-waveform of the quantum state control signal of quantum bit Q2 as the second sub-waveform. Both the first sub-waveform and the second sub-waveform will produce the XY crosstalk effect of quantum bit Q1. According to the scheme of this application, we need to obtain the compensation signal waveforms of the first sub-waveform and the second sub-waveform respectively to offset the crosstalk effect of the first sub-waveform and the second sub-waveform. Figure 3 The first sub-waveform and the second sub-waveform are shown in FIG. Figure 3 The first timing diagram shows the compensation signal waveform for the first sub-waveform, the second timing diagram shows the compensation signal waveform for the second sub-waveform, and the third timing diagram shows the compensation waveform after the two compensation signal waveforms are combined.

[0052] from Figure 2 It can be seen that the quantum bit Q3 has only one sub-waveform. Similar to the previous example, we obtain the compensation signal waveform of this waveform to offset its crosstalk effect on the quantum bit Q1. Figure 4 The timing diagram shown in is the compensation signal waveform for the sub-waveform of quantum bit Q3. According to the scheme of this application, we will Figure 3 The compensation signal waveform of Q1 to Q2 and Figure 4The compensation signal waveform of Q1 to Q3 is merged into the initial quantum state control signal waveform of Q1. For details, please refer to Figure 5 The fourth timing diagram in FIG. 1 . The solution of the present application can effectively compensate for the crosstalk effect of qubits Q2 and Q3 on qubit Q1.

[0053] Specifically, in this embodiment, the compensation signal waveform is obtained by:

[0054] When a sub-waveform of the second waveform is applied to the crosstalk qubit, and an X-gate signal is applied to the target qubit, a first change in the probability of the target qubit being in a first eigenstate as a function of the amplitude and phase of the compensation signal waveform is obtained;

[0055] An amplitude and a phase satisfying a preset condition are acquired based on the first change condition, and the compensation signal waveform is determined based on the acquired amplitude and phase.

[0056] Those skilled in the art can understand that the X-gate signal is a single-qubit logic gate, and the X-gate signal can excite the qubit from the ground state to the |1> state.

[0057] Optionally, the frequency of the compensation signal waveform is determined by the frequency of the corresponding sub-waveform. Specifically, in this embodiment, the frequency of the compensation signal waveform is equal to the frequency of the corresponding sub-waveform. Figure 2 and Figure 3 For example, Figure 3 The frequency of the compensation signal waveform of the first sub-waveform is equal to the frequency of the first sub-waveform, and the frequency of the compensation signal waveform of the second sub-waveform is equal to the frequency of the second sub-waveform. In addition, the position of the compensation signal waveform in time sequence is also aligned with the corresponding sub-waveform.

[0058] Specifically, in this embodiment, the acquiring the amplitude and phase satisfying the preset condition based on the first change condition includes:

[0059] Acquire an extreme value point of the probability that the target quantum bit is in a first eigenstate based on the first change situation;

[0060] Obtain the amplitude and phase corresponding to the extreme point.

[0061] It should be noted that, in this embodiment, the first eigenstate can be a |1> state or a |0> state. When the first eigenstate is a |1> state, the maximum point of the probability that the target quantum bit is in the |1> state is obtained, and the amplitude and phase corresponding to the maximum point are the values ​​we need. When the first eigenstate is a |0> state, the minimum point of the probability that the target quantum bit is in the |0> state is obtained, and the amplitude and phase corresponding to the minimum point are the values ​​we need.

[0062] Specifically, in this embodiment, determining the compensation signal waveform according to the acquired amplitude and phase includes:

[0063] Acquire the envelope of the compensation signal waveform based on the acquired amplitude and phase;

[0064] The compensation signal waveform is acquired based on the envelope.

[0065] Furthermore, in order to ensure that the signal used for compensation can better offset the crosstalk effect, the best implementation method is to align the compensation signal waveform with the sub-waveform to be compensated in timing. Specifically, in this embodiment, the updating of the first waveform in timing based on all the acquired compensation signal waveforms includes:

[0066] All acquired compensation signal waveforms are merged into the first waveform to update the first waveform, wherein the position of each compensation signal waveform in the timing diagram is the same as the position of the corresponding sub-waveform in the timing diagram.

[0067] Based on the same invention concept, please refer to Figure 6 The embodiment of the present invention further provides a device for compensating XY crosstalk of a quantum bit, comprising:

[0068] A first waveform acquisition unit 100, used to acquire a first waveform of a quantum state control signal of a target quantum bit;

[0069] A second waveform acquisition unit 200 is used to acquire a second waveform of the quantum state control signal of each interfering quantum bit, wherein the second waveform includes a plurality of sub-waveforms, and the interfering quantum bit is a quantum bit that has a crosstalk effect on the quantum state control signal of the target quantum bit in the quantum chip;

[0070] A compensation waveform acquisition unit 300, used to acquire a compensation signal waveform corresponding to each sub-waveform, wherein the compensation signal waveform is a waveform of a signal applied to the target quantum bit to compensate for the crosstalk effect caused by the sub-waveform on the target quantum bit;

[0071] The first waveform updating unit 400 is configured to update the first waveform in time sequence based on all the acquired compensation signal waveforms.

[0072] It can be understood that the first waveform acquisition unit 100, the second waveform acquisition unit 200, the compensation waveform acquisition unit 300 and the first waveform update unit 400 can be combined in one device, or any one of the modules can be split into multiple sub-modules, or at least part of the functions of one or more modules of the first waveform acquisition unit 100, the second waveform acquisition unit 200, the compensation waveform acquisition unit 300 and the first waveform update unit 400 can be combined with at least part of the functions of other modules and implemented in one functional module. According to an embodiment of the present invention, at least one of the first waveform acquisition unit 100, the second waveform acquisition unit 200, the compensation waveform acquisition unit 300 and the first waveform update unit 400 can be at least partially implemented as a hardware circuit, such as a field programmable gate array (FPGA), a programmable logic array (PLA), a system on a chip, a system on a substrate, a system on a package, an application specific integrated circuit (ASIC), or can be implemented in hardware or firmware in any other reasonable way of integrating or packaging the circuit, or in a suitable combination of software, hardware and firmware. Alternatively, at least one of the first waveform acquisition unit 100, the second waveform acquisition unit 200, the compensation waveform acquisition unit 300 and the first waveform updating unit 400 may be at least partially implemented as a computer program module, and when the program is executed by a computer, the function of the corresponding module may be executed.

[0073] Based on the same inventive concept, an embodiment of the present invention further proposes a quantum computing measurement and control system, which utilizes the XY crosstalk compensation method of a quantum bit described in any one of the above-mentioned characteristic descriptions, or includes the XY crosstalk compensation device of a quantum bit described in the above-mentioned characteristic descriptions.

[0074] Based on the same inventive concept, an embodiment of the present invention also proposes a quantum computer, including the quantum computing measurement and control system described in the above feature description.

[0075] Based on the same inventive concept, an embodiment of the present invention further proposes a readable storage medium having a computer program stored thereon, which, when executed by a processor, can implement a method for compensating the XY crosstalk of a quantum bit described in any one of the above-mentioned feature descriptions.

[0076] The readable storage medium can be a tangible device that can keep and store the instructions used by the instruction execution device, such as but not limited to an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device or any suitable combination of the above. The more specific example (non-exhaustive list) of the readable storage medium includes: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disk read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanical encoding device, such as a punch card or a convex structure in a groove on which instructions are stored, and any suitable combination of the above. The computer program described here can be downloaded from the readable storage medium to each computing / processing device, or downloaded to an external computer or external storage device through a network, such as the Internet, a local area network, a wide area network and / or a wireless network. The network can include copper transmission cables, optical fiber transmission, wireless transmission, routers, firewalls, switches, gateway computers and / or edge servers. The network adapter card or network interface in each computing / processing device receives the computer program from the network and forwards the computer program for storage in a readable storage medium in each computing / processing device. The computer program for performing the operation of the present invention may be an assembly instruction, an instruction set architecture (ISA) instruction, a machine instruction, a machine-dependent instruction, a microcode, a firmware instruction, a state setting data, or a source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Smalltalk, C++, etc., and conventional procedural programming languages ​​such as "C" language or similar programming languages. The computer program may be executed entirely on the user's computer, partially on the user's computer, as an independent software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., using an Internet service provider to connect through the Internet). In some embodiments, by utilizing the state information of a computer program to personalize an electronic circuit, such as a programmable logic circuit, a field programmable gate array (FPGA), or a programmable logic array (PLA), the electronic circuit can execute computer-readable program instructions to implement various aspects of the present invention.

[0077] Here, various aspects of the present invention are described with reference to the flowchart and / or block diagram of the method, system and computer program product according to the embodiment of the present invention. It should be understood that each square frame of the flowchart and / or block diagram and the combination of the square frames in the flowchart and / or block diagram can be realized by a computer program. These computer programs can be provided to the processor of a general-purpose computer, a special-purpose computer or other programmable data processing device, so as to produce a machine, so that these programs, when executed by the processor of a computer or other programmable data processing device, produce a device for realizing the function / action specified in one or more square frames in the flowchart and / or block diagram. These computer programs can also be stored in a readable storage medium, and these computer programs make the computer, programmable data processing device and / or other equipment work in a specific way, so that the readable storage medium storing the computer program includes a manufactured product, which includes instructions for realizing various aspects of the function / action specified in one or more square frames in the flowchart and / or block diagram.

[0078] The computer program may also be loaded onto a computer, other programmable data processing apparatus, or other device so that a series of operational steps are executed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby causing the computer program executed on the computer, other programmable data processing apparatus, or other device to implement the functions / actions specified in one or more boxes in the flowchart and / or block diagram.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example" or "specific example" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0080] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any technician in the relevant technical field, without departing from the scope of the technical solution of the present invention, makes any form of equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, which does not depart from the content of the technical solution of the present invention and still falls within the protection scope of the present invention.

Claims

1. A method for compensating XY crosstalk of a quantum bit, characterized in that: include: Acquire a first waveform of a quantum state control signal of a target quantum bit; Acquire a second waveform of the quantum state control signal of each interfering quantum bit, wherein the second waveform includes a plurality of sub-waveforms, and the interfering quantum bit is a quantum bit that has a crosstalk effect on the quantum state control signal of the target quantum bit in the quantum chip; Obtaining a compensation signal waveform corresponding to each sub-waveform, wherein the compensation signal waveform is a waveform of a signal applied to the target quantum bit for compensating for the crosstalk effect caused by the sub-waveform on the target quantum bit; The first waveform is updated in time sequence based on all the acquired compensation signal waveforms.

2. The method according to claim 1, characterized in that The compensation signal waveform is obtained by: When a sub-waveform of the second waveform is applied to the crosstalk qubit, and an X-gate signal is applied to the target qubit, a first change in the probability of the target qubit being in a first eigenstate as a function of the amplitude and phase of the compensation signal waveform is obtained; An amplitude and a phase satisfying a preset condition are acquired based on the first change condition, and the compensation signal waveform is determined based on the acquired amplitude and phase.

3. The method according to claim 2, characterized in that The frequency of the compensation signal waveform is determined by the frequency of the corresponding sub-waveform.

4. The method according to claim 2, characterized in that The acquiring an amplitude and a phase satisfying a preset condition based on the first change condition includes: Acquire an extreme value point of the probability that the target quantum bit is in a first eigenstate based on the first change situation; Obtain the amplitude and phase corresponding to the extreme point.

5. The method according to claim 2, characterized in that The step of determining the compensation signal waveform by using the acquired amplitude and phase includes: Acquire the envelope of the compensation signal waveform based on the acquired amplitude and phase; The compensation signal waveform is acquired based on the envelope.

6. The method according to claim 1, characterized in that The updating of the first waveform in time sequence based on all the acquired compensation signal waveforms includes: All acquired compensation signal waveforms are merged into the first waveform to update the first waveform, wherein the position of each compensation signal waveform in the timing diagram is the same as the position of the corresponding sub-waveform in the timing diagram.

7. A device for compensating XY crosstalk of a quantum bit, characterized in that: include: A first waveform acquisition unit, used to acquire a first waveform of a quantum state control signal of a target quantum bit; A second waveform acquisition unit, used to acquire a second waveform of the quantum state control signal of each interfering quantum bit, wherein the second waveform includes sub-waveforms of several frequencies, and the interfering quantum bit is a quantum bit that has a crosstalk effect on the quantum state control signal of the target quantum bit in the quantum chip; A compensation waveform acquisition unit, used to acquire a compensation signal waveform corresponding to each sub-waveform, wherein the compensation signal waveform is a waveform of a signal applied to the target quantum bit to compensate for the crosstalk effect caused by the sub-waveform on the target quantum bit; The first waveform updating unit is used to update the first waveform in time sequence based on all the acquired compensation signal waveforms.

8. A quantum computing measurement and control system, characterized in that: A method for compensating the XY crosstalk of a quantum bit using any one of claims 1 to 6, or a device for compensating the XY crosstalk of a quantum bit including the device described in claim 7.

9. A quantum computer, characterized in that: Including the quantum computing measurement and control system as described in claim 8.

10. A readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, it can implement the method for compensating XY crosstalk of a quantum bit according to any one of claims 1 to 6.

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