Quality determination method and device of quantum chip and electronic equipment

Abstract

The invention relates to the technical field of quantum chips, in particular to a quantum chip quality determination method and device and electronic equipment, and the method comprises the steps: comparing cavity mode crosstalk data corresponding to a to-be-measured sub-bit in a collected quantum chip with a first crosstalk threshold value, and obtaining a comparison result; determining the number of quantum bits which do not meet the requirement according to the comparison result; and determining the quality of the quantum chip on the basis of the quantity. The cavity mode crosstalk data corresponding to the quantum bits are acquired by using the vector network analyzer, the crosstalk detection efficiency is improved, and meanwhile, the quality of the quantum chip is determined by analyzing the cavity mode crosstalk data corresponding to the to-be-measured sub-bits in the quantum chip, so that the accuracy of the quality of the quantum chip is improved. Therefore, the quantum chip is ensured to meet user requirements in practical application.

Description

Technical Field

[0001] The present application relates to the field of quantum chip technology, and in particular to a method, device and electronic device for determining the quality of a quantum chip. Background Art

[0002] There are several quantum bits integrated on the quantum chip. Under ideal conditions, the crosstalk between the control lines of each quantum bit inside the quantum chip should be as small as possible, so that the quantum bit control signals that control each quantum bit will not interfere with each other, thereby improving the accuracy of gate control.

[0003] The existing technology is to use the Rabi oscillation method to determine the crosstalk size of one bit's driving line to another bit's driving line during low-temperature bit testing. This requires calibrating the bit information of the measured quantum bit so that the device can emit a frequency that can cause the quantum bit to produce Rabi oscillation. This method can only use one frequency at a time, and the calibration of quantum bit information takes time, which is not conducive to the rapid advancement of crosstalk detection. At the same time, when quantum chips are used in actual applications, the quality of quantum chips must be guaranteed, and the crosstalk inside the quantum chip directly affects the quality of the quantum chip. Therefore, how to determine the quality of quantum chips from the perspective of crosstalk is a technical problem that needs to be solved.

[0004] Application Contents

[0005] The present application provides a method, device and electronic device for determining the quality of a quantum chip, so as to solve the problem of how to determine the quality of a quantum chip from the aspect of crosstalk.

[0006] The embodiment of this specification provides a method for determining the quality of a quantum chip, including:

[0007] Comparing the collected cavity mode crosstalk data corresponding to the subbit to be measured in the quantum chip with the first crosstalk value threshold to obtain a comparison result; wherein the cavity mode crosstalk data is data used to characterize the interference caused to the read bus to be measured corresponding to the subbit to be measured and / or the read bus to be measured corresponding to other quantum bits when the control line of the subbit to be measured transmits the quantum bit control signal under the preset test frequency band, and the first crosstalk value threshold is set under the test frequency band;

[0008] The quality of the quantum chip is determined according to the comparison result.

[0009] Optionally, the method further includes:

[0010] Collect cavity mode crosstalk data corresponding to the quantum bits to be measured in the quantum chip;

[0011] The collecting of cavity mode crosstalk data corresponding to the subbit to be measured in the quantum chip includes:

[0012] Preset the test frequency band of vector network analyzer;

[0013] Connecting the input end of the vector network analyzer to the control line port of the quantum bit to be measured on the quantum chip, and connecting the receiving end of the vector network analyzer to the output port of the read bus to be measured;

[0014] The vector network analyzer is operated to collect cavity mode crosstalk data corresponding to the sub-bit to be measured.

[0015] Optionally, the method further includes:

[0016] The sub-bits to be measured and the read buses to be measured are determined according to the crosstalk influencing factors, wherein the crosstalk influencing factors include one or more of the importance of the quantum bits, the spatial distribution of the quantum bits, the routing layout of the control lines of the quantum bits, and the routing layout of the read buses, the sub-bits to be measured include at least one quantum bit, and the read buses to be measured include at least one read bus to be measured.

[0017] Optionally, determining the quality of the quantum chip according to the comparison result includes:

[0018] When a crosstalk value in the cavity mode crosstalk data is higher than the first crosstalk value threshold, the quantum bit corresponding to the cavity mode crosstalk data does not meet the requirements;

[0019] When there is no crosstalk value in the cavity mode crosstalk data that is higher than the first crosstalk value threshold, the quantum bit corresponding to the cavity mode crosstalk data meets the requirements;

[0020] Determine the number of qubits that do not meet the requirements;

[0021] A quality of the quantum chip is determined based on the quantity.

[0022] Optionally, determining the quality of the quantum chip based on the quantity includes:

[0023] When the number is zero, the quality of the quantum chip is qualified;

[0024] Alternatively, the method further includes: determining the quality of the quantum chip according to the comparison result and the second crosstalk value threshold, and including:

[0025] When the number is not zero, the quality of the quantum chip is determined based on the number of quantum bits that do not meet the requirements and a second crosstalk value threshold, wherein the second crosstalk value threshold is set under the test frequency band.

[0026] Optionally, determining the quality of the quantum chip based on the quantity and a second crosstalk value threshold comprises:

[0027] When the number is higher than a preset quantum bit number threshold and / or when the cavity mode crosstalk data corresponding to the quantum bits that do not meet the requirements has a crosstalk value higher than the second crosstalk value threshold, the quality of the quantum chip is unqualified;

[0028] Alternatively, the method further includes: determining the quality of the quantum chip according to the comparison result, the second crosstalk value threshold, and the importance of the quantum bit, and includes:

[0029] When the cavity mode crosstalk data corresponding to the quantum bit that does not meet the requirements has a crosstalk value lower than the second crosstalk value threshold and the number is greater than zero and lower than the preset quantum bit number threshold, the quality of the quantum chip is determined based on the importance of the quantum bit, wherein the importance is pre-set.

[0030] Optionally, determining the quality of the quantum chip based on the importance of the quantum bits includes:

[0031] When the importance of the quantum bits that do not meet the requirements meets the preset importance, the quality of the quantum chip is unqualified;

[0032] When the importance of the quantum bits that do not meet the requirements does not meet the preset importance, the quality of the quantum chip is qualified.

[0033] The embodiment of this specification also provides a device for determining the quality of a quantum chip, including:

[0034] A data comparison module, used to compare the collected cavity mode crosstalk data corresponding to the quantum bit in the quantum chip with a first crosstalk value threshold to obtain a comparison result; wherein the cavity mode crosstalk data is data used to characterize the interference caused to the read bus when the control line of the quantum bit transmits the quantum bit control signal under a preset test frequency band, and the first crosstalk value threshold is set under the test frequency band;

[0035] A quantum chip quality determination module is used to determine the quality of the quantum chip according to the comparison result.

[0036] An electronic device comprises a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to execute the method described above.

[0037] A storage medium, characterized in that a computer program is stored in the storage medium, and the computer program is configured to execute the above-mentioned method when running.

[0038] Its beneficial effects are: the present application compares the collected cavity mode crosstalk data corresponding to the sub-bit to be measured in the quantum chip with the first crosstalk value threshold to obtain a comparison result; determines the number of quantum bits that do not meet the requirements based on the comparison result; determines the quality of the quantum chip based on the number. The present application uses a vector network analyzer to collect the cavity mode crosstalk data corresponding to the quantum bit, thereby improving the crosstalk detection efficiency. At the same time, by analyzing the cavity mode crosstalk data corresponding to the sub-bit to be measured in the quantum chip, the quality of the quantum chip is determined, thereby ensuring that the quantum chip meets user needs when actually used. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0040] Figure 1 A schematic diagram of the principle of a method for determining the mass of a quantum chip provided in an embodiment of this specification;

[0041] Figure 2 A schematic diagram of the connection between a vector network analyzer and a quantum chip is provided for the embodiments of this specification;

[0042] Figure 3 A schematic diagram of the structure of a device for determining the mass of a quantum chip provided in an embodiment of this specification;

[0043] Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of this specification;

[0044] Figure 5 A schematic diagram of a computer-readable medium provided for an embodiment of this specification. DETAILED DESCRIPTION

[0045] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limiting the present application.

[0046] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limiting the present application.

[0047] It should be noted that the relative arrangement of components and steps, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.

[0048] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0049] Techniques, methods, and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment shall be regarded as part of the specification.

[0050] In all the examples shown and discussed herein, any specific values should be construed as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

[0051] It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

[0052] Referring to Figure 1 A schematic diagram of the principle of a method for determining the quality of a quantum chip provided by an embodiment of this specification, including:

[0053] S101: Compare the crosstalk data of the cavity mode corresponding to the quantum bit to be measured in the collected quantum chip with a first crosstalk value threshold to obtain a comparison result; wherein, the crosstalk data of the cavity mode is data used to characterize the interference caused to the measured read bus corresponding to the quantum bit to be measured and / or the measured read bus corresponding to other quantum bits when the control line of the quantum bit to be measured transmits a quantum bit control signal in a preset test frequency band, and the first crosstalk value threshold is set in the test frequency band;

[0054] S102: Determine the quality of the quantum chip according to the comparison result.

[0055] Optionally, the method further includes:

[0056] Collect the crosstalk data of the cavity mode corresponding to the quantum bit to be measured in the quantum chip;

[0057] The step of collecting the crosstalk data of the cavity mode corresponding to the quantum bit to be measured in the quantum chip includes:

[0058] Preset the test frequency band of the vector network analyzer;

[0059] Connect the input end of the vector network analyzer to the control line port of the quantum bit to be measured on the quantum chip, and connect the receiving end of the vector network analyzer to the output port of the measured read bus;

[0060] Run the vector network analyzer to collect the crosstalk data of the cavity mode corresponding to the quantum bit to be measured.

[0061] In an optional embodiment, before comparing the collected cavity mode crosstalk data corresponding to the subbit to be measured in the quantum chip with the first crosstalk value threshold, it is necessary to first collect the cavity mode crosstalk data corresponding to the subbit to be measured in the quantum chip. Specifically, first preset the test frequency band of the vector network analyzer 3, such as setting the test frequency band to 5GHz-6GHz, and then connect the input end of the vector network analyzer 3 to the control line port of the subbit to be measured 2 on the quantum chip 1, and connect the receiving end of the vector network analyzer 3 to the output port of the read bus to be measured, such as Figure 2 The figure shows a connection diagram of the vector network analyzer 3 and the quantum chip 1, wherein the read bus input port to be measured and the read bus output port to be measured represent two ports of the same read bus, and the control line interface is a port for connecting the XY control line with the sub-bit 2 to be measured in the quantum chip 1; thereafter, the vector network analyzer 3 is run to realize the collection of cavity mode crosstalk data corresponding to the sub-bit 2 to be measured by the vector network analyzer 3, thereby improving the crosstalk detection efficiency and obtaining the crosstalk situation of the line more quickly and clearly.

[0062] After the cavity mode crosstalk data corresponding to the subbit 2 to be measured in the quantum chip 1 is collected, each crosstalk value in the collected cavity mode crosstalk data corresponding to the subbit to be measured needs to be compared with the first crosstalk value threshold to obtain a comparison result. For example, the first crosstalk value threshold set at the test frequency band of 5GHz-6GHz is -100DBx. When the crosstalk values ​​in the cavity mode crosstalk data corresponding to a certain quantum bit are all lower than -100DBx, the quantum bit meets the requirements. Under the premise of measuring only the quantum bit, the quality of the quantum chip corresponding to the quantum bit is qualified. When the crosstalk value in the cavity mode crosstalk data corresponding to a certain quantum bit is greater than -100DBx, the quantum bit does not meet the requirements, and it is necessary to judge whether the quantum chip corresponding to the quantum bit is qualified based on other judgment conditions. The above method is used to judge whether the quantum bits in the quantum chip meet the requirements, and provide data support for the subsequent determination of the quality of the quantum chip. At the same time, under the premise of measuring only one quantum bit, whether the quantum bits in the quantum chip meet the requirements determines whether the quality of the quantum chip meets the requirements, that is, when the quantum bit meets the requirements, the quality of the quantum chip corresponding to the quantum bit also meets the requirements; when the quantum bit does not meet the requirements, the quality of the quantum chip corresponding to the quantum bit does not meet the requirements. The quality of the quantum chip is determined in the above method.

[0063] Optionally, determining the quality of the quantum chip according to the comparison result includes:

[0064] When a crosstalk value in the cavity mode crosstalk data is higher than the first crosstalk value threshold, the quantum bit corresponding to the cavity mode crosstalk data does not meet the requirements;

[0065] When there is no crosstalk value in the cavity mode crosstalk data that is higher than the first crosstalk value threshold, the quantum bit corresponding to the cavity mode crosstalk data meets the requirements;

[0066] Determine the number of qubits that do not meet the requirements;

[0067] When the quantity is zero, the quality of the quantum chip is qualified.

[0068] In an optional embodiment, for example, there are 16 quantum bits to be measured. At this time, the cavity mode crosstalk data corresponding to the collected 16 quantum bits need to be compared with the first crosstalk value threshold one by one, and then the number of quantum bits that do not meet the requirements is counted. When the number is zero, it means that the quantum bits to be measured meet the requirements, so that the quality of the quantum chip corresponding to the quantum bits to be measured is also qualified; when the number is not zero, the quality of the quantum chip is determined according to the comparison result and the second crosstalk value threshold, that is, the quality of the quantum chip is determined based on the number of quantum bits that do not meet the requirements and the second crosstalk value threshold. When the number is higher than the preset quantum bit number threshold and / or when the cavity mode crosstalk data corresponding to the quantum bits that do not meet the requirements has a crosstalk value higher than the second crosstalk value threshold, the quality of the quantum chip is unqualified; when the cavity mode crosstalk data corresponding to the quantum bits that do not meet the requirements has a crosstalk value lower than the second crosstalk value threshold and the number is greater than zero and lower than the preset quantum bit number threshold, the quality of the quantum chip is determined based on the importance of the quantum bits, wherein the importance is preset and the second crosstalk value threshold is set under the test frequency band. It should be noted that the second crosstalk value threshold is to prevent the control line of a certain quantum bit from causing great interference to the read bus. Even if the number of quantum bits that do not meet the requirements is lower than the preset quantum bit number threshold, the quality of the quantum chip still does not meet the requirements, because the interference generated by the quantum bit on the read bus is too strong, and the impact is large and cannot be ignored. Therefore, in this case, the quality of the quantum chip is directly judged as unqualified. For example, the quantum bit number threshold is set to 3, and the second crosstalk value threshold set at the test frequency band of 5GHz-6GHz is -20DBx. When the number of quantum bits that do not meet the requirements is 2, and / or when there is a crosstalk value higher than -20DBx in the cavity mode crosstalk data corresponding to the quantum bit that does not meet the requirements, the quality of the quantum chip is directly judged as unqualified. When the number of quantum bits that do not meet the requirements is greater than zero and less than 3, and when there is no crosstalk value higher than -20DBx in the cavity mode crosstalk data corresponding to the quantum bit that does not meet the requirements, the quality of the quantum chip is qualified without considering the importance of the quantum bit. The quantum bits to be measured in the quantum chip are analyzed in the above manner to determine the quality of the quantum chip, thereby ensuring that the quantum chip meets user needs in actual use.

[0069] Optionally, determining the quality of the quantum chip based on the importance of the quantum bits includes:

[0070] When the importance of the quantum bits that do not meet the requirements meets the preset importance, the quality of the quantum chip is unqualified;

[0071] When the importance of the quantum bits that do not meet the requirements does not meet the preset importance, the quality of the quantum chip is qualified.

[0072] In an optional embodiment, whether the quantum chip meets the requirements is also determined in combination with the importance of the quantum bits, under the premise of considering the importance of the quantum bits. For example, assuming that there are 16 quantum bits to be measured, the quantum bit number threshold is 3, the first crosstalk value threshold set at the test frequency band of 5GHz-6GHz is -100DBx, and the second crosstalk value threshold is -20DBx. The number of quantum bits that do not meet the requirements is 2, and the importance of the quantum bits is divided into three levels: ordinary, secondary, and important. The preset importance is important and secondary. When there is no crosstalk value in the cavity mode crosstalk data corresponding to the quantum bit that does not meet the requirements When it is higher than -20DBx, the importance of the two quantum bits is determined to be within the preset importance level. If the importance of the two quantum bits is not within the important or minor level, it means that even if the two quantum bits do not meet the first crosstalk value threshold of -100DBx, they can basically meet the operation requirements of the quantum chip. At this time, the quality of the quantum chip is determined to be qualified; on the contrary, if the importance of the two quantum bits is at the important or minor level, it means that such quantum bits will seriously affect the practicality of the quantum chip and cannot be ignored. At this time, the quality of the quantum chip is determined to be unqualified and needs to be remade or the process corrected. By analyzing the quantum bits that do not meet the requirements in the above manner, the quality of the quantum chip is determined, thereby ensuring that the quantum chip meets the user's needs in actual use and avoiding losses caused by errors in the operation of the quantum chip.

[0073] Optionally, the method further includes:

[0074] The sub-bits to be measured and the read buses to be measured are determined according to the crosstalk influencing factors, wherein the crosstalk influencing factors include one or more of the importance of the quantum bits, the spatial distribution of the quantum bits, the routing layout of the control lines of the quantum bits, and the routing layout of the read buses, the sub-bits to be measured include at least one quantum bit, and the read buses to be measured include at least one read bus to be measured.

[0075] In an optional embodiment, when there are fewer qubits on a quantum chip, each bit can be analyzed to determine the quality of the quantum chip. However, for a quantum chip with multiple qubits integrated, if cavity mode crosstalk data is collected and subsequently compared for each qubit, too much data collection time and subsequent data comparison time will be wasted. Therefore, in order to reduce the number of data collection times for vector network analysis to reduce data collection time, when determining the quality of the quantum chip, data collection and comparison for individual qubits are sufficient. For example, data collection and comparison are only performed for qubits in the quantum chip whose qubit importance is at an important level. Yes, the subbits to be measured can also be determined based on the routing density of the control lines of the qubits, the subbits to be measured can be determined based on the spatial distribution density of the qubits, and the read bus to be measured can be determined based on the routing density of the control lines of the qubits and / or the routing layout density of the read bus, that is, the subbits to be measured can be determined based on one or more of the importance of the qubits, the spatial distribution of the qubits, the routing layout of the control lines of the qubits, and the routing layout of the read bus. Of course, the description of the crosstalk influencing factors does not limit the specific content of the crosstalk influencing factors, and the subbits to be measured and the read bus to be measured can be determined based on actual needs, the overall layout of the chip, etc. The above method reduces the number of data acquisitions and the acquisition time, and reduces the subsequent data comparison time.

[0076] This application uses a vector network analyzer to collect cavity mode crosstalk data corresponding to quantum bits, thereby improving the efficiency of crosstalk detection. At the same time, by analyzing the cavity mode crosstalk data corresponding to the quantum bits to be measured in the quantum chip, the quality of the quantum chip can be determined, thereby ensuring that the quantum chip meets user needs during actual use.

[0077] Reference Figure 3 A schematic diagram of a device for determining the quality of a quantum chip provided in an embodiment of this specification includes:

[0078] The data comparison module 201 is used to compare the collected cavity mode crosstalk data corresponding to the quantum bit in the quantum chip with the first crosstalk value threshold to obtain a comparison result; wherein the cavity mode crosstalk data is data used to characterize the interference caused to the read bus when the control line of the quantum bit transmits the quantum bit control signal under the preset test frequency band, and the first crosstalk value threshold is set under the test frequency band;

[0079] The quantum chip quality determination module 202 is used to determine the quality of the quantum chip according to the comparison result.

[0080] Optionally, the device further comprises:

[0081] The cavity mode crosstalk data acquisition module is used to collect the cavity mode crosstalk data corresponding to the sub-bits to be measured in the quantum chip;

[0082] The cavity mode crosstalk data acquisition module includes:

[0083] A test frequency band preset unit, used for presetting the test frequency band of the vector network analyzer;

[0084] A line connection unit, used to connect the input end of the vector network analyzer to the control line port of the quantum bit to be measured on the quantum chip, and connect the receiving end of the vector network analyzer to the output port of the read bus to be measured;

[0085] The cavity mode crosstalk data acquisition unit is used to run the vector network analyzer to acquire cavity mode crosstalk data corresponding to the sub-bit to be measured.

[0086] Optionally, the device further comprises:

[0087] The module for determining a target to be measured is used to determine the sub-bits to be measured and the read bus to be measured according to the crosstalk influencing factors, wherein the crosstalk influencing factors include one or more of the importance of the quantum bits, the spatial distribution of the quantum bits, the routing layout of the control lines of the quantum bits, and the routing layout of the read bus. The sub-bits to be measured include at least one quantum bit, and the read bus to be measured includes at least one read bus to be measured.

[0088] Optionally, the quantum chip quality determination module 202 includes:

[0089] A first determination unit, configured to determine that, when a crosstalk value in the cavity mode crosstalk data is higher than the first crosstalk value threshold, the quantum bit corresponding to the cavity mode crosstalk data does not meet the requirements;

[0090] A second determination unit, configured to determine that, when there is no crosstalk value in the cavity mode crosstalk data that is higher than the first crosstalk value threshold, the quantum bit corresponding to the cavity mode crosstalk data meets the requirement;

[0091] A quantum bit quantity determination unit, used to determine the quantity of quantum bits that do not meet the requirements;

[0092] A first quantum chip quality determination unit is used to determine the quality of the quantum chip based on the quantity.

[0093] Optionally, the first quantum chip quality determination unit includes:

[0094] A first quantum chip quality determination subunit, used for determining that the quality of the quantum chip is qualified when the quantity is zero;

[0095] Alternatively, the device further includes: a second quantum chip quality determination unit, configured to determine the quality of the quantum chip based on the number of non - compliant qubits and a second crosstalk value threshold when the number is not zero, where the second crosstalk value threshold is set in the test frequency band.

[0096] Optionally, the second quantum chip quality determination unit is further configured to determine that the quality of the quantum chip is unqualified when the number is higher than a preset qubit number threshold and / or when there is a crosstalk value higher than the second crosstalk value threshold in the cavity mode crosstalk data corresponding to the non - compliant qubits;

[0097] Alternatively, the device further includes: a third quantum chip quality determination unit, configured to determine the quality of the quantum chip based on the importance level of the qubits when there is a crosstalk value lower than the second crosstalk value threshold in the cavity mode crosstalk data corresponding to the non - compliant qubits, the number is greater than zero and lower than the preset qubit number threshold, where the importance level is preset.

[0098] Optionally, the third quantum chip quality determination unit includes:

[0099] A first quality judgment subunit, configured to determine that the quality of the quantum chip is unqualified when the importance level of the non - compliant qubits meets the preset importance level;

[0100] A second quality judgment subunit, configured to determine that the quality of the quantum chip is qualified when the importance level of the non - compliant qubits does not meet the preset importance level.

[0101] Regarding the device in the above - mentioned embodiments, the processes of performing operations in each step have been described in detail in the embodiments related to the method, and will not be elaborated here.

[0102] Based on the same application concept, an embodiment of this specification further provides an electronic device.

[0103] The following describes an embodiment of the electronic device of the present application. This electronic device can be regarded as a specific physical implementation manner of the above - mentioned method and device embodiments of the present application. For the details described in the embodiment of the electronic device of the present application, they should be regarded as a supplement to the above - mentioned method or device embodiments; for the details not disclosed in the embodiment of the electronic device of the present application, they can be implemented with reference to the above - mentioned method or device embodiments.

[0104] Refer to Figure 4 A schematic structural diagram of an electronic device provided in an embodiment of this specification. The following refers to Figure 4 Describe the electronic device 300 according to this embodiment of the present application. Figure 4 The electronic device 300 shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0105] like Figure 4 As shown, the electronic device 300 is in the form of a general-purpose computing device. The components of the electronic device 300 may include, but are not limited to: at least one processing unit 310, at least one storage unit 320, a bus 330 connecting different device components (including the storage unit 320 and the processing unit 310), a display unit 340, etc.

[0106] The storage unit stores a program code, which can be executed by the processing unit 310, so that the processing unit 310 performs the steps of various exemplary embodiments of the present application described in the above processing method section of this specification. For example, the processing unit 310 can perform the following steps: Figure 1 Steps shown.

[0107] The storage unit 320 may include a readable medium in the form of a volatile storage unit, such as a random access memory unit (RAM) 3201 and / or a cache memory unit 3202 , and may further include a read-only memory unit (ROM) 3203 .

[0108] The storage unit 320 may also include a program / utility 3204 having a set (at least one) of program modules 3205, such program modules 3205 including but not limited to: operating means, one or more application programs, other program modules and program data, each of which or some combination may include the implementation of a network environment.

[0109] Bus 330 may represent one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0110] The electronic device 300 may also communicate with one or more external devices 400 (e.g., keyboards, pointing devices, Bluetooth devices, etc.), one or more devices that enable a user to interact with the electronic device 300, and / or any device that enables the electronic device 300 to communicate with one or more other computing devices (e.g., routers, modems, etc.). Such communication may be performed through an input / output (I / O) interface 350. Furthermore, the electronic device 300 may also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) through a network adapter 360. The network adapter 360 may communicate with other modules of the electronic device 300 through the bus 330. It should be understood that although Figure 4 Not shown, other hardware and / or software modules may be used in conjunction with the electronic device 300, including but not limited to microcode, device drivers, redundant processing units, external disk drive arrays, RAID devices, tape drives, and data backup storage devices.

[0111] Through the description of the above implementation methods, it is easy for those skilled in the art to understand that the exemplary embodiments described in the present application can be implemented by software, or by software combined with necessary hardware. Therefore, the technical solution according to the implementation method of the present application can be embodied in the form of a software product, which can be stored in a computer-readable storage medium (which can be a CD-ROM, USB flash drive, mobile hard disk, etc.) or on a network, including a number of instructions to enable a computing device (which can be a personal computer, server, or network device, etc.) to execute the above method according to the present application. When the computer program is executed by a data processing device, the computer-readable medium can implement the above method of the present application, that is: Figure 1 The method shown.

[0112] Reference Figure 5 An embodiment of this specification provides a schematic diagram of the principle of a computer-readable medium.

[0113] accomplish Figure 1The computer program of the method shown can be stored on one or more computer readable media. The computer readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor device, device or component, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0114] The computer readable storage medium may include a data signal propagated in a baseband or as part of a carrier wave, wherein a readable program code is carried. This propagated data signal may take a variety of forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination of the above. The readable storage medium may also be any readable medium other than a readable storage medium, which may send, propagate, or transmit a program for use by or in combination with an instruction execution device, device, or device. The program code contained on the readable storage medium may be transmitted using any suitable medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination of the above.

[0115] Program code for performing the operations of the present application may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., using an Internet service provider to connect through the Internet).

[0116] In summary, the present application can be implemented in hardware, or in a software module running on one or more processors, or in a combination thereof. It should be understood by those skilled in the art that general data processing devices such as microprocessors or digital signal processors (DSPs) can be used in practice to implement some or all functions of some or all components in the embodiments of the present application. The present application can also be implemented as a device or apparatus program (e.g., computer program and computer program product) for executing part or all of the methods described herein. Such a program implementing the present application can be stored on a computer-readable medium, or can have the form of one or more signals. Such a signal can be downloaded from an Internet website, or provided on a carrier signal, or provided in any other form.

[0117] The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the present application is not inherently related to any specific computer, virtual device or electronic device, and various general devices can also implement the present application. The above description is only a specific embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

[0118] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0119] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A method for determining the quality of a quantum chip, It is characterized in that include: Comparing the collected cavity mode crosstalk data corresponding to the subbit to be measured in the quantum chip with the first crosstalk value threshold to obtain a comparison result; wherein the cavity mode crosstalk data is data used to characterize the interference caused to the read bus to be measured corresponding to the subbit to be measured and / or the read bus to be measured corresponding to other quantum bits when the control line of the subbit to be measured transmits the quantum bit control signal under the preset test frequency band, and the first crosstalk value threshold is set under the test frequency band; The quality of the quantum chip is determined according to the comparison result.

2. The method according to claim 1, It is characterized in that The method further comprises: Collect cavity mode crosstalk data corresponding to the quantum bits to be measured in the quantum chip; The collecting of cavity mode crosstalk data corresponding to the subbit to be measured in the quantum chip includes: Preset the test frequency band of vector network analyzer; Connecting the input end of the vector network analyzer to the control line port of the quantum bit to be measured on the quantum chip, and connecting the receiving end of the vector network analyzer to the output port of the read bus to be measured; The vector network analyzer is operated to collect cavity mode crosstalk data corresponding to the sub-bit to be measured.

3. The method according to claim 1, It is characterized in that The method further comprises: The sub-bits to be measured and the read buses to be measured are determined according to the crosstalk influencing factors, wherein the crosstalk influencing factors include one or more of the importance of the quantum bits, the spatial distribution of the quantum bits, the routing layout of the control lines of the quantum bits, and the routing layout of the read buses, the sub-bits to be measured include at least one quantum bit, and the read buses to be measured include at least one read bus to be measured.

4. The method according to claim 3, It is characterized in that Determining the quality of the quantum chip according to the comparison result includes: When a crosstalk value in the cavity mode crosstalk data is higher than the first crosstalk value threshold, the quantum bit corresponding to the cavity mode crosstalk data does not meet the requirements; When there is no crosstalk value in the cavity mode crosstalk data that is higher than the first crosstalk value threshold, the quantum bit corresponding to the cavity mode crosstalk data meets the requirements; Determine the number of qubits that do not meet the requirements; A quality of the quantum chip is determined based on the quantity.

5. The method according to claim 4, It is characterized in that Determining the quality of the quantum chip based on the quantity includes: When the number is zero, the quality of the quantum chip is qualified; Alternatively, the method further includes: determining the quality of the quantum chip according to the comparison result and the second crosstalk value threshold, and including: When the number is not zero, the quality of the quantum chip is determined based on the number of quantum bits that do not meet the requirements and a second crosstalk value threshold, wherein the second crosstalk value threshold is set under the test frequency band.

6. The method according to claim 5, It is characterized in that The determining the quality of the quantum chip based on the quantity and the second crosstalk value threshold comprises: When the number is higher than a preset quantum bit number threshold and / or when the cavity mode crosstalk data corresponding to the quantum bits that do not meet the requirements has a crosstalk value higher than the second crosstalk value threshold, the quality of the quantum chip is unqualified; Alternatively, the method further includes: determining the quality of the quantum chip according to the comparison result, the second crosstalk value threshold, and the importance of the quantum bit, and includes: When the cavity mode crosstalk data corresponding to the quantum bit that does not meet the requirements has a crosstalk value lower than the second crosstalk value threshold and the number is greater than zero and lower than the preset quantum bit number threshold, the quality of the quantum chip is determined based on the importance of the quantum bit, wherein the importance is pre-set.

7. The method according to claim 6, It is characterized in that Determining the quality of the quantum chip based on the importance of the quantum bits includes: When the importance of the quantum bits that do not meet the requirements meets the preset importance, the quality of the quantum chip is unqualified; When the importance of the quantum bits that do not meet the requirements does not meet the preset importance, the quality of the quantum chip is qualified.

8. A device for determining the quality of a quantum chip, which is implemented based on the method according to any one of claims 1 to 7, Features ,include: A data comparison module, used to compare the collected cavity mode crosstalk data corresponding to the quantum bit in the quantum chip with a first crosstalk value threshold to obtain a comparison result; wherein the cavity mode crosstalk data is data used to characterize the interference caused to the read bus when the control line of the quantum bit transmits the quantum bit control signal under a preset test frequency band, and the first crosstalk value threshold is set under the test frequency band; A quantum chip quality determination module is used to determine the quality of the quantum chip according to the comparison result.

9. An electronic device, It is characterized in that The method comprises a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to execute the method according to any one of claims 1 to 7.

10. A storage medium, It is characterized in that The storage medium stores a computer program, and the computer program is configured to execute the method according to any one of claims 1 to 7 when running.

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