Method and device for eliminating quantum noise, electronic equipment and medium
A quantum noise and quantum technology, applied in the field of quantum computing, can solve the problems that quantum computers are difficult to realize, quantum error correction quantum gates are difficult to realize, and methods are not universal.
Active Publication Date: 2021-06-18
BEIJING BAIDU NETCOM SCI & TECH CO LTD
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Problems solved by technology
In quantum error correction technology, each logical qubit is composed of many physical bits, and error correction is realized through redundant physical qubit resources. However, as the number of physical bits increases, the types of errors that may occur in the system will also increase. At the same time, the operation of multi-qubit encoding requires non-local interaction between physical qubits, so quantum error correction and quantum gates of logical bits are difficult to realize experimentally.
The quantum error mitigation scheme does not require additional physical bits, but it imposes requirements on the error type and error controllability of the quantum circuit, which makes it difficult to realize on the near-term quantum computer, and its method is not universal
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[0017] Exemplary embodiments of the present disclosure are described below in conjunction with the accompanying drawings, which include various details of the embodiments of the present disclosure to facilitate understanding, and they should be regarded as exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope of the present disclosure. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
[0018] In the present disclosure, unless otherwise stated, using the terms "first", "second", etc. to describe various elements is not intended to limit the positional relationship, temporal relationship or importance relationship of these elements, and such terms are only used for Distinguishes one element from another. In some examples, the first element and the second ...
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The invention provides a method and device for eliminating quantum noise, electronic equipment, a computer readable storage medium and a computer program product, and relates to the field of quantum computing, in particular to the technical field of quantum noise processing. According to the implementation scheme, the method includes: defining an expression of first mapping, wherein the expression is close to inverse mapping of a quantum noise channel within a preset error tolerance range; performing quasi-probability decomposition on the first mapping so that the sum of absolute values of decomposition coefficients respectively corresponding to each of the plurality of obtained first quantum channels has a minimum value; according to the probability distribution of the plurality of first quantum channels, sampling the plurality of first quantum channels for a preset number of times, so that the first quantum channels are obtained through serial sampling at an output port of the quantum computer after each sampling, the first quantum channels and the quantum computer are used as a whole for calculation, and a calculation result is obtained; and calculating an average value of calculation results obtained by all sampling as unbiased estimation of the calculation results.
Description
technical field [0001] The present disclosure relates to the field of quantum computing, in particular to the technical field of quantum noise processing, and in particular to a method, device, electronic equipment, computer-readable storage medium and computer program product for eliminating quantum noise. Background technique [0002] Quantum computer technology has developed rapidly in recent years, but noise problems in quantum computers in the foreseeable future are unavoidable: heat dissipation in qubits or random fluctuations generated in lower-level quantum physics processes, It will flip or randomize the state of the qubit, causing the calculation process to fail. [0003] Currently, technical solutions for dealing with quantum noise mainly include the following two categories: Quantum Error Correction technology and Quantum Error Mitigation technology. In quantum error correction technology, each logical qubit is composed of many physical bits, and error correctio...
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Login to View More IPC IPC(8): G06N10/00G06F17/18
CPCG06N10/00G06F17/18
Inventor 王鑫王琨赵炫强
Owner BEIJING BAIDU NETCOM SCI & TECH CO LTD