Method and apparatus for denoising quantum device, electronic device, and computer readable medium

The present disclosure provides a method for denoising a quantum device and an apparatus for denoising a quantum device, and relates to the technical fields, such as quantum circuits, 5 quantum algorithms, and quantum calibration. A specific implementation scheme includes: acquiring a noise channel of an actual quantum device; determining a truncation coefficient based on the noise channel, the truncation coefficient being used for characterizing the number of expanded items of a 10 Neumann series of the noise channel at a current error tolerance; running the actual quantum device to generate an intermediate quantum state; performing a first iteration of applying the noise channel to the intermediate quantum state for the number of times, the number being equal to a value of the truncation 15 coefficient, each applying stage of the first iteration being performed based on a result of a previous applying stage of the first iteration; and computing a zero-noise expected value of an ideal quantum device corresponding to the actual quantum device based on the intermediate quantum state and a resultant 20 quantum state obtained through each applying stage of the first iteration. This embodiment realizes the denoising of a quantum circuit.