Method and device for eliminating quantum noise, computer equipment, medium and product
A quantum computer and quantum noise technology, applied in the computer field, can solve problems such as the difficulty of implementing quantum error correction quantum gates, the lack of universality of the method, and the difficulty of implementing quantum computers, etc., to achieve the effect of solving intractable problems
Active Publication Date: 2021-03-19
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] 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 element may refer to the same instance of the element, and in some cases, they may also refer to different instances based on contextual description.
[0018] The terminology used in describing the various described examples in this disclosure is for the purpose of describing particular examples only and is not intended to be limiting. Unless the context clearly indicates otherwise, if the number of elements is not specifically limited, there may be one or more elements. In addition, the term "and / or" used in the present disclosure covers any one and all possible combinations of the listed items.
[0019] So...
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The invention provides a method and device for eliminating quantum noise, computer equipment, a medium and a product, and relates to the technical field of computers, in particular to a quantum computer. The method for eliminating the quantum noise of the quantum computer comprises the following steps: modeling the quantum noise of the quantum computer to obtain a quantum noise channel; performingquasi-probability decomposition on the inverse mapping of the quantum noise channel to obtain a set and quasi-probability distribution of sub-quantum channels of the inverse mapping of the quantum noise channel; calculating and obtaining corresponding probability distribution according to the quasi-probability distribution; sampling the set of sub-quantum channels for a predetermined number of times according to the probability distribution, and connecting the corresponding sub-quantum channels in series at the output port of the quantum computer according to the sampling result after each time of sampling so as to perform data calculation on the sub-quantum channels and the quantum computer as a whole to obtain a calculation result; and calculating an average value of the obtained calculation results to serve as unbiased estimation of the calculation results of the quantum computer after the quantum noise is eliminated.
Description
technical field [0001] The present disclosure relates to the field of computer technology, in particular to quantum computers, and in particular to a method and device for eliminating quantum noise, computer equipment, media and products. 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 correction is realized through redundant physical qubit resources. However, as ...
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Login to View More IPC IPC(8): G06N10/00
CPCG06N10/00
Inventor 王鑫王琨蒋佳卿
Owner BEIJING BAIDU NETCOM SCI & TECH CO LTD