Method for reducing crosstalk of quantum measurement and control AWG array

Abstract

The invention discloses a method for reducing crosstalk of a quantum measurement and control AWG array. The method comprises the following steps: reducing electromagnetic coupling interference between adjacent channels by adopting a filtering technology; frequency band noise suppression is carried out on each channel signal through the band-pass filter, and signal distortion caused by crosstalk is reduced; meanwhile, the dynamic priority signal distribution mechanism monitors and adjusts the bit error rate Bmr and the signal distortion rate Ssz of each channel in real time, the channel with the lowest bit error rate Bmr and the lowest signal distortion rate Ssz is preferentially selected for signal transmission, the waveform distortion of quantum bit operation signals is avoided, and the accuracy and the stability of signal transmission are improved; a stability evaluation index Swzs is calculated by constructing a signal interference risk data set and combining an interference prediction model in a fitting manner, when the stability evaluation index Swzs exceeds a preset evaluation threshold W, a system sends a stability early warning instruction, and adjustment is performed for multiple times through a feedback mechanism, so that the system is ensured to maintain high precision and high stability.

Description

Technical Field

[0001] The present invention relates to the field of cold chain storage technology, and in particular to a method for reducing crosstalk of a quantum measurement and control AWG array. Background Art

[0002] Quantum measurement and control technology originated from the basic research of quantum mechanics and has gradually developed with the progress of quantum information science. At the end of the 20th century, the physical realization of quantum bits promoted the demand for quantum computing and quantum communication, and quantum measurement and control technology came into being. By precisely controlling quantum states and their evolution, researchers can control quantum systems and improve the accuracy and efficiency of quantum computing and information processing; the application fields of quantum measurement and control technology include quantum computing, quantum communication, quantum cryptography, quantum sensing, and quantum simulation, and are widely used in high-precision measurement, superconducting quantum circuits, ion traps and other fields.

[0003] With the development of quantum computing technology, the requirements for measurement and control accuracy are increasing, and the crosstalk of AWG arrays has become one of the main bottlenecks. When applied to quantum communication, the crosstalk problem of AWG arrays stems from electromagnetic interference between signals, and also causes the following technical disadvantages:

[0004] 1. Signal distortion: The crosstalk of the AWG array will cause distortion of the quantum bit operation signal, resulting in inaccurate waveform and affecting the correct transmission and reception of the quantum state.

[0005] 2. Increased bit error rate: Crosstalk introduces additional noise, increasing the bit error rate in quantum communication. Especially in complex channels, the accuracy of information transmission will be significantly affected.

[0006] 3. Reduced precision in quantum state manipulation: Since quantum communication relies on precise control of quantum states, the noise caused by crosstalk may interfere with the fine manipulation of quantum states, reducing communication reliability and data integrity. Summary of the invention

[0007] The object of the present invention is to provide a method for reducing crosstalk of a quantum measurement and control AWG array to solve the above-mentioned problem.

[0008] The present invention is achieved through the following technical solutions:

[0009] A method for reducing crosstalk of a quantum measurement and control AWG array comprises the following steps:

[0010] S1. Perform signal separation preprocessing on each qubit operation signal in the AWG array, use filtering technology to reduce electromagnetic interference between adjacent channels, generate corresponding metadata for each operation signal, and then upload the processed signal data and metadata to the quantum measurement and control management platform;

[0011] S2. Collect historical data of the AWG array signal data in the quantum measurement and control management platform, calculate the bit error rate Bmr based on the historical bit error data, and compare and analyze the bit error rate Bmr with the preset bit error threshold Q. If the bit error rate Bmr exceeds the bit error threshold Q, issue a preliminary crosstalk warning instruction;

[0012] S3. After receiving the early warning instruction, a dynamic priority signal allocation mechanism is adopted to set different priorities for signals when multiple AWG channels are operated simultaneously, give priority to channel operations with lower bit errors, and monitor and record the signal interference data and bit error data information of each channel in the AWG array in real time, pre-process the signal interference data and bit error data information, and construct a signal interference risk data set;

[0013] S4. By extracting features from the signal interference risk data set generated in step S3, the crosstalk degree value Csz, signal distortion rate Ssz and signal distortion regional distribution index Rsz in different monitoring periods are obtained and correlated to obtain the quantum measurement and control system damage coefficient Qsxs; then, the system signal stability evaluation index Swzs is obtained by fitting and calculating through the trained system interference prediction model;

[0014] S5. Set the stability evaluation threshold W, and compare and analyze the stability evaluation index Swzs with the evaluation threshold W, comprehensively analyze the system stability risk caused by signal crosstalk of the AWG array, generate corresponding prediction instructions, and take corresponding management measures according to the prediction instructions to reduce the impact of crosstalk, including signal isolation and channel switching; at the same time, the management measures adjust the operating accuracy and stability of the quantum measurement and control system.

[0015] Preferably,

[0016] S11: divide the quantum bit operation signals of each channel in the AWG array into signal channels and mark them using a serial number marking method, specifically marked as: Td1, Td2....Tdn; n represents the total number of divided channels; finally, set signal isolation measures for adjacent channels, including reducing the direct coupling effect between signals by adjusting the channel spacing;

[0017] S12: Filter the signals of each divided channel, and suppress the noise within the frequency band of the signal of each channel by using a bandpass filter to reduce the electromagnetic interference between channels; after the filtering process is completed, generate corresponding metadata for each signal and upload it to the quantum measurement and control management platform.

[0018] Preferably,

[0019] S21: extract historical data in the AWG array from the quantum measurement and control management platform, including the signal transmission error record log and the transmission events of each channel; extract the total number of bit errors Wzc from the signal transmission error record log, and obtain the total number of data transmissions Scs by counting the transmission events of each channel;

[0020] By associating the total number of bit errors Wzc and the total number of data transmissions Scs, the bit error rate Bmr of the current time period is obtained. The specific calculation formula is as follows:

[0021]

[0022] Preferably,

[0023] S22: Compare and evaluate the preset bit error threshold Q with the bit error rate Bmr to generate the following evaluation content:

[0024] If the bit error rate Bmr ≤ the bit error threshold Q, it means that the bit error rate Bmr of the current AWG array is normal, and there is no crosstalk problem in the system signal. In this case, no warning instruction is issued;

[0025] If the bit error rate Bmr> the bit error threshold Q, it indicates that the bit error rate Bmr of the current AWG array is abnormal. The bit errors increase due to the system signal crosstalk. At this time, a crosstalk warning instruction is issued, including the bit error rate Bmr value of the current time period, and the user is reminded or further intervention measures are taken.

[0026] Preferably,

[0027] S31: After receiving the crosstalk warning instruction, the system starts the dynamic priority signal allocation mechanism, sorts the real-time bit error rate Bmr values ​​of each channel, sets the signal processing priority according to the current lowest bit error rate Bmr between the channels, and gives priority to processing the signal of the channel with the lowest bit error rate Bmr.

[0028] S32: Monitor the signal interference data and error information of each channel in the AWG array in real time, record and pre-process these data; the interference data includes signal strength changes and frequency band fluctuations, and the error information is obtained by extracting the transmission error record log; after the data pre-processing is completed, construct a signal interference risk data set through the signal interference data and error information.

[0029] Preferably,

[0030] S41: based on the signal interference risk data set, extract features therefrom, and obtain the crosstalk degree value Csz, the signal distortion rate Ssz and the signal distortion regional distribution index Rsz in each monitoring period respectively;

[0031] The crosstalk level value Csz is output through real-time interference detection of each channel in the AWG array;

[0032] The signal distortion rate Ssz is obtained by arranging multiple sensors in different channels of the AWG array to sample the signal; the signal collected by each sensor is compared with the preset standard signal, and the difference between the waveform of the AWG output signal and the waveform of the standard signal is calculated. The specific calculation formula is as follows:

[0033]

[0034] Among them, X i is the actual signal value in the signal interference risk data set, is the ideal signal value in the signal interference risk data set, and N is the total number of sampling points in the signal interference risk data set;

[0035] The signal distortion regional distribution index Rsz is obtained by analyzing the difference in spatial distribution of signal distortion. The specific calculation formula is as follows:

[0036]

[0037] In the formula, Ssz i represents the signal distortion rate in the i-th channel, A i represents the channel area in the ith channel, and Zmj represents the total area of ​​all channels;

[0038] m represents the total number of regions where the signal distortion is distributed.

[0039] Preferably,

[0040] S42: Correlate and calculate the crosstalk degree value Csz, the signal distortion rate Ssz and the signal distortion regional distribution index Rsz to obtain the quantum measurement and control system damage coefficient Qsxs. The specific calculation formula is as follows:

[0041] Qsxs=Csz×Ssz×Rsz.

[0042] Preferably,

[0043] S43: Based on the obtained damage coefficient Qsxs, the interference prediction model is fitted and calculated to generate the system signal stability evaluation index Swzs; wherein the interference prediction model is trained by a machine learning algorithm, and the model input parameters include the bit error rate Bmr, the historical data in the AWG array, and the signal interference risk data set. The model output is the signal stability evaluation index Swzs. The specific calculation formula of the signal stability evaluation index Swzs is as follows:

[0044] Swzs=f(Qsxs,Bmr)

[0045] Where f represents the fitting function of the prediction model.

[0046] Preferably,

[0047] S51: By comparing and analyzing the stability evaluation index Swzs with the evaluation threshold W, the following evaluation contents are generated:

[0048] If the stability evaluation index Swzs ≤ the evaluation threshold W, it means that the system is operating normally and no further measures are needed;

[0049] If the stability evaluation index Swzs>evaluation threshold W, it means that the system is operating abnormally and there is a stability risk, and the corresponding prediction instruction is generated for prompting.

[0050] Preferably,

[0051] S52: According to the early warning instructions, take the following management measures:

[0052] S521: Take channel switching measures:

[0053] Channel priority adjustment: sort the values ​​of the bit error rate Bmr and signal distortion rate Ssz in the system, and dynamically adjust the channel switching priority; give priority to the channel with the lowest bit error rate Bmr and signal distortion rate Ssz for signal transmission;

[0054] Backup channel activation: When the signal has serious crosstalk, the system automatically activates the backup channel; when the signal interference of a channel exceeds the preset threshold, the system switches to the backup channel and isolates and repairs the interfered channel at the same time;

[0055] S522: Operation accuracy and stability adjustment measures:

[0056] Accuracy compensation mechanism: When the system switches channels or takes signal isolation measures, it will cause short-term fluctuations in operating accuracy. The system uses internal algorithms to perform real-time compensation and automatically adjusts the AWG output waveform based on interference data.

[0057] Stability monitoring and feedback: Real-time monitoring of the stability of the quantum measurement and control system after signal isolation and channel switching, recording the system status and providing feedback through signal interference detection, so that the stability of the system meets the set standards after each adjustment; if crosstalk is still found after adjustment, the system will issue a warning command again and make a second adjustment.

[0058] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0059] 1. Aiming at the problem of signal distortion, the present invention adopts filtering technology to reduce electromagnetic coupling interference between adjacent channels, and suppresses frequency band noise of each channel signal through a bandpass filter, thereby reducing signal distortion caused by crosstalk; at the same time, through a dynamic priority signal allocation mechanism, the bit error rate Bmr and signal distortion rate Ssz of each channel are monitored, adjusted and sorted in real time, and the channel with the lowest bit error rate Bmr and signal distortion rate Ss is preferentially selected for signal transmission, thereby avoiding waveform distortion of quantum bit operation signals and improving the accuracy and stability of signal transmission;

[0060] 2. In order to reduce the problem of rising bit error rate caused by crosstalk, the present invention evaluates the signal quality of the AWG array by extracting historical data and calculating the real-time bit error rate Bmr, and sets the bit error rate threshold Q. When the bit error rate Bmr exceeds the bit error rate threshold Q, the system automatically issues a crosstalk warning instruction. At the same time, the spare channel activation mechanism ensures that the system can quickly switch to the spare channel when the signal is severely distorted, thereby ensuring the continuity and correctness of signal transmission and reducing the impact of the bit error rate.

[0061] 3. In view of the technical disadvantage of reduced precision in quantum state manipulation, the present invention adjusts the output waveform of the AWG in real time through precision compensation mechanism and signal stability monitoring measures. When channel switching or signal isolation measures cause fluctuations in operating precision, the system automatically compensates and adjusts the waveform to ensure precise control of the quantum state. In addition, by constructing a signal interference risk data set and combining it with an interference prediction model, the stability evaluation index Swzs of the system is fitted and calculated. When the stability evaluation index Swzs exceeds a preset threshold, the system issues a stability warning instruction and makes multiple adjustments through a feedback mechanism to ensure that the quantum measurement and control system always maintains high precision and high stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0063] Figure 1 It is a schematic diagram of the steps of the present invention. DETAILED DESCRIPTION

[0064] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and drawings. The schematic implementation modes and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention. It should be noted that the present invention is already in the actual development and use stage.

[0065] Example 1

[0066] like Figure 1As shown, this embodiment includes a method for reducing crosstalk of a quantum measurement and control AWG array, comprising the following steps:

[0067] S1. Perform signal separation preprocessing on each qubit operation signal in the AWG array, use filtering technology to reduce electromagnetic interference between adjacent channels, generate corresponding metadata for each operation signal, and then upload the processed signal data and metadata to the quantum measurement and control management platform;

[0068] S2. Collect historical data of the AWG array signal data in the quantum measurement and control management platform, calculate the bit error rate Bmr based on the historical bit error data, and compare and analyze the bit error rate Bmr with the preset bit error threshold Q. If the bit error rate Bmr exceeds the bit error threshold Q, issue a preliminary crosstalk warning instruction;

[0069] S3. After receiving the early warning instruction, a dynamic priority signal allocation mechanism is adopted to set different priorities for signals when multiple AWG channels are operated simultaneously, give priority to channel operations with lower bit errors, and monitor and record the signal interference data and bit error data information of each channel in the AWG array in real time, pre-process the signal interference data and bit error data information, and construct a signal interference risk data set;

[0070] S4. By extracting features from the signal interference risk data set generated in step S3, the crosstalk degree value Csz, signal distortion rate Ssz and signal distortion regional distribution index Rsz in different monitoring periods are obtained and correlated to obtain the quantum measurement and control system damage coefficient Qsxs; then, the system signal stability evaluation index Swzs is obtained by fitting and calculating through the trained system interference prediction model;

[0071] S5. Set the stability evaluation threshold W, and compare and analyze the stability evaluation index Swzs with the evaluation threshold W, comprehensively analyze the system stability risk caused by signal crosstalk of the AWG array, generate corresponding prediction instructions, and take corresponding management measures according to the prediction instructions to reduce the impact of crosstalk, including signal isolation and channel switching; at the same time, the management measures adjust the operating accuracy and stability of the quantum measurement and control system.

[0072] In this embodiment, S1 separates and pre-processes the signals of the AWG array and uses filtering technology to reduce electromagnetic interference between adjacent channels, thereby effectively reducing the possibility of signal crosstalk and improving signal independence and transmission quality;

[0073] S2 collects historical data to calculate the bit error rate Bmr and compares and analyzes it with the preset bit error threshold Q. It can promptly detect the bit error problem caused by crosstalk and issue a preliminary crosstalk warning instruction to prevent the bit error rate from further increasing.

[0074] S3 uses a dynamic priority signal allocation mechanism to give priority to channel operations with lower bit errors, monitor and record signal interference data and bit error data information in the AWG array in real time, which can effectively reduce signal interference and bit errors and ensure the accuracy and stability of signal transmission;

[0075] S4 obtains the crosstalk degree value Csz, signal distortion rate Ssz and signal distortion regional distribution index Rsz through feature extraction and correlates them, which can accurately evaluate the impact of signal crosstalk, generate the damage coefficient Qsxs, and calculate the system signal stability evaluation index Swzs through the trained interference prediction model, effectively predicting the future signal stability of the system;

[0076] By setting the stability assessment threshold W and performing comparative analysis with Swzs, S5 can identify potential risks in system operation in advance, and take management measures such as signal isolation and channel switching according to the generated prediction instructions. At the same time, it adjusts the system operation accuracy and stability, further reduces the impact of signal crosstalk, and ensures the stable operation of the quantum measurement and control system.

[0077] Example 2

[0078] S11: divide the quantum bit operation signals of each channel in the AWG array into signal channels and mark them using a serial number marking method, specifically marked as: Td1, Td2....Tdn; n represents the total number of divided channels; finally, set signal isolation measures for adjacent channels, including reducing the direct coupling effect between signals by adjusting the channel spacing;

[0079] S12: Filter the signals of each divided channel, and suppress the noise within the frequency band of the signal of each channel by using a bandpass filter to reduce the electromagnetic interference between channels; after the filtering process is completed, generate corresponding metadata for each signal and upload it to the quantum measurement and control management platform.

[0080] In this embodiment, the quantum bit operation signals of each channel in the AWG array are divided into signal channels through step S11, and are marked by serial number marking, such as Td1, Td2...Tdn; by setting signal isolation measures, such as adjusting the channel spacing, the electromagnetic interference and direct coupling effects between adjacent channels are effectively reduced, ensuring the independence and stability of signal transmission; step S12 suppresses the noise of the signals of each channel within the frequency band through a bandpass filter, further reducing the electromagnetic interference between channels and ensuring the clarity and accuracy of the signal; after filtering, metadata is generated for each signal and uploaded to the quantum measurement and control management platform for subsequent monitoring and management; these measures comprehensively improve the anti-interference ability of the signals in the AWG array, reduce the risk of signal crosstalk, and ensure the transmission stability and accuracy of the quantum bit operation signals.

[0081] Example 3

[0082] S21: extract historical data in the AWG array from the quantum measurement and control management platform, including the signal transmission error record log and the transmission events of each channel; extract the total number of bit errors Wzc from the signal transmission error record log, and obtain the total number of data transmissions Scs by counting the transmission events of each channel;

[0083] By associating the total number of bit errors Wzc and the total number of data transmissions Scs, the bit error rate Bmr of the current time period is obtained. The specific calculation formula is as follows:

[0084]

[0085] S22: Compare and evaluate the preset bit error threshold Q with the bit error rate Bmr to generate the following evaluation content:

[0086] If the bit error rate Bmr ≤ the bit error threshold Q, it means that the bit error rate Bmr of the current AWG array is normal, and there is no crosstalk problem in the system signal. In this case, no warning instruction is issued;

[0087] If the bit error rate Bmr> the bit error threshold Q, it indicates that the bit error rate Bmr of the current AWG array is abnormal. The bit errors increase due to the system signal crosstalk. At this time, a crosstalk warning instruction is issued, including the bit error rate Bmr value of the current time period, and the user is reminded or further intervention measures are taken.

[0088] In this embodiment, step S21 extracts historical data of the AWG array from the quantum measurement and control management platform, including the signal transmission error record log and the transmission events of each channel, obtains the total number of bit errors Wzc and the total number of data transmissions Scs, and further calculates the bit error rate Bmr of the current time period; the total number of bit errors Wzc reflects the transmission errors of the system in a period of time, and the total number of data transmissions Scs represents the total data transmission volume in the time period. The bit error rate Bmr can be accurately calculated by associating the two, and the reliability of system transmission can be evaluated; S22 compares and analyzes the bit error rate Bmr with the preset bit error threshold Q. If the bit error rate Bmr is less than or equal to the bit error threshold Q, it indicates that the current AWG array is operating normally and there is no signal crosstalk problem. If the bit error rate Bmr is greater than the bit error threshold Q, it indicates that the bit error rate is abnormal and caused by signal crosstalk. At this time, a crosstalk warning instruction is issued to remind the user to intervene or take corresponding measures; this mechanism effectively monitors and prevents bit error problems caused by signal crosstalk, ensuring the stability and accuracy of system signal transmission.

[0089] Example 4

[0090] S31: After receiving the crosstalk warning instruction, the system starts the dynamic priority signal allocation mechanism, sorts the real-time bit error rate Bmr values ​​of each channel, sets the signal processing priority according to the current lowest bit error rate Bmr between the channels, and gives priority to processing the signal of the channel with the lowest bit error rate Bmr.

[0091] S32: Monitor the signal interference data and error information of each channel in the AWG array in real time, record and pre-process these data; the interference data includes signal strength changes and frequency band fluctuations, and the error information is obtained by extracting the transmission error record log; after the data pre-processing is completed, construct a signal interference risk data set through the signal interference data and error information.

[0092] In this embodiment, after receiving the crosstalk warning instruction through step S31, the system starts the dynamic priority signal allocation mechanism, sorts the channels according to the real-time bit error rate Bmr, and gives priority to the channel signals with the lowest bit error rate Bmr to ensure the accuracy and stability of signal transmission; in step S32, the system monitors the signal interference data and bit error information of each channel in the AWG array in real time, the interference data includes signal strength changes and frequency band fluctuations, and the bit error information is obtained by extracting the transmission error record log; by preprocessing these data, the system constructs a signal interference risk data set, which is helpful to evaluate the signal transmission quality in real time, discover potential problems in time and take intervention measures, and ultimately improve the anti-interference capability of the AWG array and the reliability of signal transmission.

[0093] Example 5

[0094] S41: based on the signal interference risk data set, extract features therefrom, and obtain the crosstalk degree value Csz, the signal distortion rate Ssz and the signal distortion regional distribution index Rsz in each monitoring period respectively;

[0095] The crosstalk level value Csz is output through real-time interference detection of each channel in the AWG array;

[0096] The signal distortion rate Ssz is obtained by arranging multiple sensors in different channels of the AWG array to sample the signal; the signal collected by each sensor is compared with the preset standard signal, and the difference between the waveform of the AWG output signal and the waveform of the standard signal is calculated. The specific calculation formula is as follows:

[0097]

[0098] Among them, X i is the actual signal value in the signal interference risk data set, is the ideal signal value in the signal interference risk data set, and N is the total number of sampling points in the signal interference risk data set;

[0099] The signal distortion regional distribution index Rsz is obtained by analyzing the difference in spatial distribution of signal distortion. The specific calculation formula is as follows:

[0100]

[0101] In the formula, Ssz i represents the signal distortion rate in the i-th channel, A i represents the channel area in the ith channel, and Zmj represents the total area of ​​all channels;

[0102] m represents the total number of regions where the signal distortion is distributed.

[0103] S42: Correlate and calculate the crosstalk degree value Csz, the signal distortion rate Ssz and the signal distortion regional distribution index Rsz to obtain the quantum measurement and control system damage coefficient Qsxs. The specific calculation formula is as follows:

[0104] Qsxs=Csz×Ssz×Rsz.

[0105] S43: Based on the obtained damage coefficient Qsxs, the interference prediction model is fitted and calculated to generate the system signal stability evaluation index Swzs; wherein the interference prediction model is trained by a machine learning algorithm, and the model input parameters include the bit error rate Bmr, the historical data in the AWG array, and the signal interference risk data set. The model output is the signal stability evaluation index Swzs. The specific calculation formula of the signal stability evaluation index Swzs is as follows:

[0106] Swzs=f(Qsxs,Bmr)

[0107] Where f represents the fitting function of the prediction model.

[0108] In this embodiment, features are extracted based on the signal interference risk data set in step S41 to obtain the crosstalk degree value Csz, the signal distortion rate Ssz and the signal distortion regional distribution index Rsz respectively; wherein the crosstalk degree value Csz is output by the real-time interference detection of each channel in the AWG array, the signal distortion rate Ssz is obtained by arranging sensors in different channels to collect signals and compare them with the standard signal, and the signal distortion regional distribution index Rsz is obtained by analyzing the differences in the spatial distribution of signal distortion. These parameters reflect the interference and distortion conditions of the AWG array in different channels; step S42 calculates the crosstalk degree value Csz, the signal distortion rate Ssz and the signal distortion regional distribution index Rsz. Ssz is correlated with the signal distortion area distribution index Rsz to obtain the quantum measurement and control system damage coefficient Qsxs, which is used to quantitatively evaluate the degree of interference of the system; S43 is based on the quantum measurement and control system damage coefficient Qsxs. The interference prediction model is used to perform fitting calculations to generate the system signal stability evaluation index Swzs, where the specific form of the fitting function f of the prediction model is: Swzs = c1 × Qsxs + c2 × Bmr + v, where c1 represents the regression coefficient of the signal stability evaluation index Swzs, c2 represents the regression coefficient of the bit error rate Bmr, and v is the error term;

[0109] The interference prediction model is trained through machine learning of bit error rate Bmr, AWG array historical data and signal interference risk data sets. It can effectively predict the future stability of the system, help to timely detect potential risks and take targeted measures.

[0110] Example 6

[0111] S51: By comparing and analyzing the stability evaluation index Swzs with the evaluation threshold W, the following evaluation contents are generated:

[0112] If the stability evaluation index Swzs ≤ the evaluation threshold W, it means that the system is operating normally and no further measures are needed;

[0113] If the stability evaluation index Swzs>evaluation threshold W, it means that the system is operating abnormally and there is a stability risk, and the corresponding prediction instruction is generated for prompting.

[0114] S52: According to the early warning instructions, take the following management measures:

[0115] S521: Take channel switching measures:

[0116] Channel priority adjustment: sort the values ​​of the bit error rate Bmr and signal distortion rate Ssz in the system, and dynamically adjust the channel switching priority; give priority to the channel with the lowest bit error rate Bmr and signal distortion rate Ssz for signal transmission;

[0117] Backup channel activation: When the signal has serious crosstalk, the system automatically activates the backup channel; when the signal interference of a channel exceeds the preset threshold, the system switches to the backup channel and isolates and repairs the interfered channel at the same time;

[0118] S522: Operation accuracy and stability adjustment measures:

[0119] Accuracy compensation mechanism: When the system switches channels or takes signal isolation measures, it will cause short-term fluctuations in operating accuracy. The system uses internal algorithms to perform real-time compensation and automatically adjusts the AWG output waveform based on interference data.

[0120] Stability monitoring and feedback: Real-time monitoring of the stability of the quantum measurement and control system after signal isolation and channel switching, recording the system status and providing feedback through signal interference detection, so that the stability of the system meets the set standards after each adjustment; if crosstalk is still found after adjustment, the system will issue a warning command again and make a second adjustment.

[0121] In this embodiment, the system signal stability evaluation index Swzs is compared and analyzed with the preset evaluation threshold W through step S51, and according to the comparison and analysis content, the system generates a prediction instruction to prompt the user; in step S52, the system takes management measures according to the prediction instruction, and dynamically adjusts the channel switching priority according to the bit error rate Bmr and the signal distortion rate Ssz through the channel priority adjustment mechanism, and gives priority to the channel with lower bit error rate and distortion rate for signal transmission; when the signal crosstalk is serious, the system automatically activates the spare channel, switches to the spare channel and isolates the interfered channel when the signal interference exceeds the preset threshold; the accuracy compensation mechanism adjusts the AWG output waveform in real time through the algorithm to avoid fluctuations in operating accuracy during channel switching or signal isolation, and the stability monitoring and feedback mechanism records and monitors the system status to ensure that the stability of the adjusted system meets the standard. If the crosstalk problem still exists, the system will issue an early warning again and make adjustments.

[0122] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for reducing crosstalk in a quantum measurement and control AWG array, characterized in that: The following steps are involved: S1. Perform signal separation preprocessing on each qubit operation signal in the AWG array, use filtering technology to reduce electromagnetic interference between adjacent channels, generate corresponding metadata for each operation signal, and then upload the processed signal data and metadata to the quantum measurement and control management platform; S2. Collect historical data of the AWG array signal data in the quantum measurement and control management platform, calculate the bit error rate Bmr based on the historical bit error data, and compare and analyze the bit error rate Bmr with the preset bit error threshold Q. If the bit error rate Bmr exceeds the bit error threshold Q, issue a preliminary crosstalk warning instruction; S3. After receiving the early warning instruction, a dynamic priority signal allocation mechanism is adopted to set different priorities for signals when multiple AWG channels are operated simultaneously, give priority to channel operations with lower bit errors, and monitor and record the signal interference data and bit error data information of each channel in the AWG array in real time, pre-process the signal interference data and bit error data information, and construct a signal interference risk data set; S4. By extracting features from the signal interference risk data set generated in step S3, the crosstalk degree value Csz, signal distortion rate Ssz and signal distortion regional distribution index Rsz in different monitoring periods are obtained and correlated to obtain the quantum measurement and control system damage coefficient Qsxs; then, the system signal stability evaluation index Swzs is obtained by fitting and calculating through the trained system interference prediction model; S5. Set the stability evaluation threshold W, and compare and analyze the stability evaluation index Swzs with the evaluation threshold W, comprehensively analyze the system stability risk caused by signal crosstalk of the AWG array, generate corresponding prediction instructions, and take corresponding management measures according to the prediction instructions to reduce the impact of crosstalk, including signal isolation and channel switching; at the same time, the management measures adjust the operating accuracy and stability of the quantum measurement and control system.

2. A method for reducing quantum measurement and control AWG array crosstalk according to claim 1, characterized in that: S11: divide the quantum bit operation signals of each channel in the AWG array into signal channels and mark them using a serial number marking method, specifically marked as: Td1, Td2....Tdn; n represents the total number of divided channels; finally, set signal isolation measures for adjacent channels, including reducing the direct coupling effect between signals by adjusting the channel spacing; S12: Filter the signals of each divided channel, and suppress the noise within the frequency band of the signal of each channel by using a bandpass filter to reduce the electromagnetic interference between channels; after the filtering process is completed, generate corresponding metadata for each signal and upload it to the quantum measurement and control management platform.

3. A method for reducing quantum measurement and control AWG array crosstalk according to claim 2, characterized in that: S21: extract historical data in the AWG array from the quantum measurement and control management platform, including the signal transmission error record log and the transmission events of each channel; extract the total number of bit errors Wzc from the signal transmission error record log, and obtain the total number of data transmissions Scs by counting the transmission events of each channel; By associating the total number of bit errors Wzc and the total number of data transmissions Scs, the bit error rate Bmr of the current time period is obtained. The specific calculation formula is as follows:

4. A method for reducing quantum measurement and control AWG array crosstalk according to claim 3, characterized in that: S22: Compare and evaluate the preset bit error threshold Q with the bit error rate Bmr to generate the following evaluation content: If the bit error rate Bmr ≤ the bit error threshold Q, it means that the bit error rate Bmr of the current AWG array is normal, and there is no crosstalk problem in the system signal. In this case, no warning instruction is issued; If the bit error rate Bmr> the bit error threshold Q, it indicates that the bit error rate Bmr of the current AWG array is abnormal. The bit errors increase due to the system signal crosstalk. At this time, a crosstalk warning instruction is issued, including the bit error rate Bmr value of the current time period, and the user is reminded or further intervention measures are taken.

5. A method for reducing crosstalk of a quantum measurement and control AWG array according to claim 4, characterized in that: S31: After receiving the crosstalk warning instruction, the system starts the dynamic priority signal allocation mechanism, sorts the real-time bit error rate Bmr values ​​of each channel, sets the signal processing priority according to the current lowest bit error rate Bmr among the channels, and gives priority to processing the signal of the channel with the lowest bit error rate Bmr; S32: Monitor the signal interference data and error information of each channel in the AWG array in real time, record and pre-process these data; the interference data includes signal strength changes and frequency band fluctuations, and the error information is obtained by extracting the transmission error record log; after the data pre-processing is completed, construct a signal interference risk data set through the signal interference data and error information.

6. A method for reducing crosstalk in a quantum measurement and control AWG array according to claim 5, characterized in that: S41: based on the signal interference risk data set, extract features therefrom, and obtain the crosstalk degree value Csz, the signal distortion rate Ssz and the signal distortion regional distribution index Rsz in each monitoring period respectively; The crosstalk level value Csz is output through real-time interference detection of each channel in the AWG array; The signal distortion rate Ssz is obtained by arranging multiple sensors in different channels of the AWG array to sample the signal; the signal collected by each sensor is compared with the preset standard signal, and the difference between the waveform of the AWG output signal and the waveform of the standard signal is calculated. The specific calculation formula is as follows: Among them, X i is the actual signal value in the signal interference risk data set, is the ideal signal value in the signal interference risk data set, and N is the total number of sampling points in the signal interference risk data set; The signal distortion regional distribution index Rsz is obtained by analyzing the difference in spatial distribution of signal distortion. The specific calculation formula is as follows: In the formula, Ssz i represents the signal distortion rate in the i-th channel, A i represents the channel area in the ith channel, and Zmj represents the total area of ​​all channels; m represents the total number of regions where the signal distortion is distributed.

7. A method for reducing crosstalk in a quantum measurement and control AWG array according to claim 6, characterized in that: S42: Correlate and calculate the crosstalk value Csz, the signal distortion rate Ssz and the signal distortion regional distribution index Rsz to obtain the quantum measurement and control system damage coefficient Qsxs. The specific calculation formula is as follows: Qsxs=Csz×Ssz×Rsz.

8. A method for reducing crosstalk in a quantum measurement and control AWG array according to claim 7, characterized in that: S43: Based on the obtained damage coefficient Qsxs, the interference prediction model is fitted and calculated to generate the system signal stability evaluation index Swzs; wherein the interference prediction model is trained by a machine learning algorithm, and the model input parameters include the bit error rate Bmr, the historical data in the AWG array, and the signal interference risk data set. The model output is the signal stability evaluation index Swzs. The specific calculation formula of the signal stability evaluation index Swzs is as follows: Swzs=f(Qsxs,Bmr) Where f represents the fitting function of the prediction model.

9. A method for reducing crosstalk in a quantum measurement and control AWG array according to claim 8, characterized in that: S51: By comparing and analyzing the stability evaluation index Swzs with the evaluation threshold W, the following evaluation contents are generated: If the stability evaluation index Swzs ≤ the evaluation threshold W, it means that the system is operating normally and no further measures are needed; If the stability evaluation index Swzs>evaluation threshold W, it means that the system is operating abnormally and there is a stability risk, and the corresponding prediction instruction is generated for prompting.

10. A method for reducing crosstalk in a quantum measurement and control AWG array according to claim 9, characterized in that: S52: According to the early warning instructions, take the following management measures: S521: Take channel switching measures: Channel priority adjustment: sort the values ​​of the bit error rate Bmr and signal distortion rate Ssz in the system, and dynamically adjust the channel switching priority; give priority to the channel with the lowest bit error rate Bmr and signal distortion rate Ssz for signal transmission; Backup channel activation: When the signal has serious crosstalk, the system automatically activates the backup channel. When the signal interference of a channel exceeds the preset threshold, the system switches to the backup channel and isolates and repairs the interfered channel at the same time. S522: Operation accuracy and stability adjustment measures: Accuracy compensation mechanism: When the system switches channels or takes signal isolation measures, it will cause short-term fluctuations in operating accuracy; The system performs real-time compensation through internal algorithms and automatically adjusts the AWG output waveform according to the interference data; Stability monitoring and feedback: Real-time monitoring of the stability of the quantum measurement and control system after signal isolation and channel switching, recording the system status and providing feedback through signal interference detection, so that the stability of the system meets the set standards after each adjustment; If crosstalk is still found after adjustment, the system will issue a warning command again and make a second adjustment.

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