Quantum noise process analysis method and apparatus, device, and storage medium

A quantum noise process analysis device, comprising a memory for storing instructions and a processor in communication with the processor, wherein the processor, when executing the instructions, causes the quantum noise process analysis device to:

• perform quantum process tomography (QPT) on a quantum noise process of a target quantum system, to obtain dynamical maps of the quantum noise process wherein the QPT involves at least one measurement of the target quantum system;
• extract transfer tensor maps (TTMs) of the quantum noise process from the dynamical maps, the TTMs being used for representing a dynamical evolution of the quantum noise process;
• and
• analyze the quantum noise process according to the TTMs by:
• extracting a second-order memory kernel of the quantum noise process according to the TTMs when the quantum noise process is a steady noise;
• calculating a correlation function of the quantum noise process according to the second-order memory kernel of the quantum noise process;
• and
• performing a Fourier transform on the correlation function of the quantum noise process to obtain a frequency spectrum of the quantum noise process.

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

• perform quantum process tomography (QPT) on a quantum noise process of a target quantum system, to obtain dynamical maps of the quantum noise process wherein the QPT involves at least one measurement of the target quantum system;
• extract transfer tensor maps (TTMs) of the quantum noise process from the dynamical maps, the TTMs being used for representing a dynamical evolution of the quantum noise process;
• and
• analyze the quantum noise process according to the TTMs by:
• extracting a second-order memory kernel of the quantum noise process according to the TTMs when the quantum noise process is a steady noise;
• calculating a correlation function of the quantum noise process according to the second-order memory kernel of the quantum noise process;
• and
• performing a Fourier transform on the correlation function of the quantum noise process to obtain a frequency spectrum of the quantum noise process.