Quantum noise process analysis method, system, storage medium, and electronic device

An apparatus for analyzing quantum noise process, the apparatus comprising:

• a memory storing instructions;
• and
• a processor in communication with the memory, wherein, when the processor executes the instructions, the processor is configured to cause the apparatus to perform:
• preparing, by a device comprising a memory storing instructions and a processor in communication with the memory, a set of quantum initial states,
• respectively inputting, by the device, the set of quantum initial states into a plurality of first circuits to obtain a plurality of first quantum output states, each of the first circuits comprising at least one noise evolution gate and at least one projection test gate, each of the at least one projection test gate corresponding to each of the at least one noise evolution gate, and different first circuits comprising different numbers of noise evolution gates,
• determining, by the device, a first dynamical map eigenspectrum comprising a first error according to a functional correspondence of a dynamical map eigenspectrum based on a quantum noise process between the plurality of first quantum output states and the set of quantum initial states,
• respectively inputting, by the device, the set of quantum initial states into a plurality of second circuits to obtain a plurality of second quantum output states, each of the second circuits comprising at least one noise evolution gate and at least one dual projection test gate, each of the at least one dual projection test gate corresponding to each of the at least one noise evolution gate, and different second circuits comprising different numbers of noise evolution gates,
• determining, by the device, a second dynamical map eigenspectrum comprising a second error according to a functional correspondence of the dynamical map eigenspectrum based on the quantum noise process between the plurality of second quantum output states and the set of quantum initial states, and
• determining, by the device, the dynamical map eigenspectrum of the quantum noise process according to the first dynamical map eigenspectrum and the second dynamical map eigenspectrum.

A non-transitory computer-readable storage medium, storing computer-readable instructions, wherein, the computer-readable instructions, when executed by a processor, are configured to cause the processor to perform:

• preparing, by a device comprising a memory storing instructions and a processor in communication with the memory, a set of quantum initial states;
• respectively inputting, by the device, the set of quantum initial states into a plurality of first circuits to obtain a plurality of first quantum output states, each of the first circuits comprising at least one noise evolution gate and at least one projection test gate, each of the at least one projection test gate corresponding to each of the at least one noise evolution gate, and different first circuits comprising different numbers of noise evolution gates;
• determining, by the device, a first dynamical map eigenspectrum comprising a first error according to a functional correspondence of a dynamical map eigenspectrum based on a quantum noise process between the plurality of first quantum output states and the set of quantum initial states;
• respectively inputting, by the device, the set of quantum initial states into a plurality of second circuits to obtain a plurality of second quantum output states, each of the second circuits comprising at least one noise evolution gate and at least one dual projection test gate, each of the at least one dual projection test gate corresponding to each of the at least one noise evolution gate, and different second circuits comprising different numbers of noise evolution gates;
• determining, by the device, a second dynamical map eigenspectrum comprising a second error according to a functional correspondence of the dynamical map eigenspectrum based on the quantum noise process between the plurality of second quantum output states and the set of quantum initial states;
• and
• determining, by the device, the dynamical map eigenspectrum of the quantum noise process according to the first dynamical map eigenspectrum and the second dynamical map eigenspectrum.