CN-121998112-A - Quantum state reading method, quantum computing measurement and control system and storage medium

Abstract

The embodiment of the application provides a quantum state reading method, a quantum computing measurement and control system and a storage medium. The quantum state reading method comprises the steps of obtaining quantum measurement and control information required by a target quantum bit to execute target quantum logic gate operation, obtaining a quantum state reading result of the target quantum bit at the current moment through a reading signal line based on a first waveform parameter to serve as a first reading result, triggering the target quantum bit to execute the target quantum logic gate operation through a bit signal line based on a second waveform parameter, obtaining a quantum state reading result of the target quantum bit after the target quantum logic gate operation is completed through the reading signal line based on the first waveform parameter to serve as a second reading result, and determining the second reading result as a target reading result corresponding to the target quantum logic gate operation when the first reading result is the target quantum state. By the technical scheme provided by the embodiment of the application, the accuracy of the quantum state reading result is improved.

Inventors

• Request for anonymity
• KONG WEICHENG

Assignees

• 本源量子计算科技（合肥）股份有限公司

Dates

Publication Date

20260508

Application Date

20241031

Claims (10)

1. 1. A method of quantum state reading, characterized by being applied to a quantum computing measurement and control system, the method comprising: Acquiring quantum measurement and control information required by a target quantum bit to execute target quantum logic gate operation, wherein the quantum measurement and control information comprises a first waveform parameter corresponding to a read signal line and a second waveform parameter corresponding to a bit signal line; based on the first waveform parameter, acquiring a quantum state reading result of the target quantum bit at the current moment through the reading signal line as a first reading result; Triggering the target qubit to perform the target quantum logic gate operation through the bit signal line based on the second waveform parameter; Based on the first waveform parameter, acquiring a quantum state reading result of the target quantum bit after the target quantum logic gate operation is completed through the reading signal line, and taking the quantum state reading result as a second reading result; And when the first reading result is a target quantum state, determining the second reading result as a target reading result corresponding to the target quantum logic gate operation.
2. 2. The method of claim 1, wherein the bit signal line comprises a pulse modulation line and a magnetic flux modulation line corresponding to the target qubit, and wherein the second waveform parameter comprises a third waveform parameter corresponding to the pulse modulation line and a fourth waveform parameter corresponding to the magnetic flux modulation line; The step of triggering the target qubit to perform the target quantum logic gate operation through the bit signal line based on the second waveform parameter includes: Generating a driving signal to be transmitted on the pulse modulation line according to the third waveform parameter; Generating a control signal to be transmitted on the magnetic flux modulation line according to the fourth waveform parameter; And transmitting the driving signal to be transmitted and the control signal to be transmitted to the target qubit through the pulse modulation line and the magnetic flux modulation line respectively, so that the target qubit executes the target quantum logic gate operation based on the driving signal to be transmitted and the control signal to be transmitted.
3. 3. The method of claim 2, wherein the quantum measurement and control information further comprises a first time delay between the pulse modulation line and the magnetic flux modulation line, the first time delay being determined based on a signal propagation time delay between the pulse modulation line and the magnetic flux modulation line; The step of transmitting the driving signal to be transmitted and the control signal to be transmitted to the target qubit through the pulse modulation line and the magnetic flux modulation line, respectively, includes: and transmitting the driving signal to be transmitted and the control signal to be transmitted to the target qubit through the pulse modulation line and the magnetic flux modulation line respectively based on the first time delay.
4. 4. The method of claim 2, wherein the quantum measurement and control information further includes a fifth waveform parameter and a first execution duration corresponding to a zero bias operation on the magnetic flux modulation line; before triggering the target qubit to perform the target quantum logic gate operation through the bit signal line based on the second waveform parameter, the method further comprises: and transmitting zero bias signals matched with the first execution duration to the target quantum bit through the magnetic flux modulation line according to the fifth waveform parameters.
5. 5. The method of claim 2, wherein the quantum measurement and control information further includes a second execution duration of the target quantum logic gate operation and a sixth waveform parameter corresponding to the operating point frequency reading operation on the magnetic flux modulation line; After transmitting the to-be-transmitted driving signal and the to-be-transmitted control signal to the target qubit through the pulse modulation line and the magnetic flux modulation line, respectively, the method further includes: And transmitting a first reading signal to the target quantum bit through the magnetic flux modulation line according to the sixth waveform parameter after the second execution duration based on the transmission time of the control signal to be transmitted.
6. 6. The method of claim 5, wherein prior to triggering the target qubit via the bit signal line to perform the target quantum logic gate operation based on the second waveform parameter, the method further comprises: And transmitting a second reading signal to the target quantum bit through the magnetic flux modulation line according to the sixth waveform parameter, wherein the triggering time of the second reading signal is the same as the triggering time of the reading operation corresponding to the first reading result, and the execution duration corresponding to the second reading signal is the same as the execution duration corresponding to the reading operation corresponding to the second reading result.
7. 7. A quantum computing measurement and control system, the quantum computing measurement and control system comprising: The device comprises an acquisition module, a logic gate operation module and a logic gate operation module, wherein the acquisition module is used for acquiring quantum measurement and control information required by a target quantum bit for executing the target quantum logic gate operation, and the quantum measurement and control information comprises a first waveform parameter corresponding to a read signal line and a second waveform parameter corresponding to a bit signal line; The first reading module is used for acquiring a quantum state reading result of the target quantum bit at the current moment through the reading signal line based on the first waveform parameter, and taking the quantum state reading result as a first reading result; The triggering module is used for triggering the target quantum bit to execute the target quantum logic gate operation through the bit signal line based on the second waveform parameter; The second reading module is used for acquiring a quantum state reading result of the target quantum bit after the target quantum logic gate operation is completed through the reading signal line based on the first waveform parameter, and taking the quantum state reading result as a second reading result; And the determining module is used for determining the second reading result as a target reading result corresponding to the target quantum logic gate operation when the first reading result is the target quantum state.
8. 8. The quantum computing measurement and control system of claim 7, wherein the bit signal line comprises a pulse modulation line and a magnetic flux modulation line corresponding to the target quantum bit, the second waveform parameter comprises a third waveform parameter corresponding to the pulse modulation line and a fourth waveform parameter corresponding to the magnetic flux modulation line; the trigger module comprises: The first generation submodule is used for generating a driving signal to be transmitted on the pulse modulation line according to the third waveform parameter; The second generation submodule is used for generating a control signal to be transmitted on the magnetic flux modulation line according to the fourth waveform parameter; And the sending submodule is used for respectively transmitting the driving signal to be transmitted and the control signal to be transmitted to the target qubit through the pulse modulation line and the magnetic flux modulation line so that the target qubit executes the operation of the target quantum logic gate based on the driving signal to be transmitted and the control signal to be transmitted.
9. 9. The quantum computing measurement and control system is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory are communicated with each other through the communication bus; A memory for storing a computer program; A processor for carrying out the method steps of any one of claims 1-6 when executing a program stored on a memory.
10. 10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored therein a computer program which, when executed by a processor, implements the method steps of any of claims 1-6.

Description

Quantum state reading method, quantum computing measurement and control system and storage medium Technical Field The application relates to the technical field of quantum measurement and control, in particular to a quantum state reading method, a quantum computing measurement and control system and a storage medium. Background Currently, when the quantum logic gate operation is executed, the quantum state corresponding to the quantum bit after the execution of the quantum logic gate operation is completed can be obtained through one-time measurement and reading operation. However, due to the uncertainty of the corresponding initial state of the qubit, the accuracy of the quantum state obtained by the measurement and reading at this time may be affected. Disclosure of Invention The embodiment of the application aims to provide a quantum state reading method, a quantum computing measurement and control system and a storage medium, so as to improve the accuracy of a quantum state reading result. The specific technical scheme is as follows: The embodiment of the application provides a quantum state reading method which is applied to a quantum computing measurement and control system, and comprises the following steps: Acquiring quantum measurement and control information required by a target quantum bit to execute target quantum logic gate operation, wherein the quantum measurement and control information comprises a first waveform parameter corresponding to a read signal line and a second waveform parameter corresponding to a bit signal line; based on the first waveform parameter, acquiring a quantum state reading result of the target quantum bit at the current moment through the reading signal line as a first reading result; Triggering the target qubit to perform the target quantum logic gate operation through the bit signal line based on the second waveform parameter; Based on the first waveform parameter, acquiring a quantum state reading result of the target quantum bit after the target quantum logic gate operation is completed through the reading signal line, and taking the quantum state reading result as a second reading result; And when the first reading result is a target quantum state, determining the second reading result as a target reading result corresponding to the target quantum logic gate operation. Optionally, the bit signal line includes a pulse modulation line and a magnetic flux modulation line corresponding to the target qubit, and the second waveform parameter includes a third waveform parameter corresponding to the pulse modulation line and a fourth waveform parameter corresponding to the magnetic flux modulation line; The step of triggering the target qubit to perform the target quantum logic gate operation through the bit signal line based on the second waveform parameter includes: Generating a driving signal to be transmitted on the pulse modulation line according to the third waveform parameter; Generating a control signal to be transmitted on the magnetic flux modulation line according to the fourth waveform parameter; And transmitting the driving signal to be transmitted and the control signal to be transmitted to the target qubit through the pulse modulation line and the magnetic flux modulation line respectively, so that the target qubit executes the target quantum logic gate operation based on the driving signal to be transmitted and the control signal to be transmitted. Optionally, the quantum measurement and control information further includes a first time delay between the pulse modulation line and the magnetic flux modulation line, where the first time delay is determined according to a signal transmission time delay between the pulse modulation line and the magnetic flux modulation line; The step of transmitting the driving signal to be transmitted and the control signal to be transmitted to the target qubit through the pulse modulation line and the magnetic flux modulation line, respectively, includes: and transmitting the driving signal to be transmitted and the control signal to be transmitted to the target qubit through the pulse modulation line and the magnetic flux modulation line respectively based on the first time delay. Optionally, the quantum measurement and control information further includes a fifth waveform parameter and a first execution duration corresponding to the zero bias operation on the magnetic flux modulation line; before triggering the target qubit to perform the target quantum logic gate operation through the bit signal line based on the second waveform parameter, the method further comprises: and transmitting zero bias signals matched with the first execution duration to the target quantum bit through the magnetic flux modulation line according to the fifth waveform parameters. Optionally, the quantum measurement and control information further includes a second execution duration of the target quantum logic gate operation and a sixth waveform