Quantum subtraction method and device, electronic device and storage medium

Abstract

The invention belongs to the field of quantum computing, and particularly relates to a quantum subtraction method and device, an electronic device and a storage medium. The method comprises the following steps: converting minuend data into a first target quantum state, and converting subtrahend data into a second target quantum state; controlling the first target quantum state to execute quantum state evolution corresponding to complement operation to obtain a first complement quantum state; controlling the current second target quantum state to execute quantum state evolution corresponding tocomplement operation to obtain a second complement quantum state; executing quantum state evolution corresponding to additive operation on the first complement quantum state and the second complementquantum state to obtain a third target quantum state; and controlling the third target quantum state to execute quantum state evolution corresponding to complement operation to obtain an evolved fourth target quantum state. The method can be used for basic arithmetic operation in a quantum circuit, and fills the blank of related technologies.

Description

technical field [0001] The invention belongs to the field of quantum computing, in particular to a quantum subtraction method, device, electronic device and storage medium. Background technique [0002] Quantum computers take advantage of the superposition of quantum and theoretically have the ability to accelerate exponentially in some cases. For example, it takes hundreds of years to crack an RSA key on a classical computer, but it only takes a few hours to execute a quantum algorithm on a quantum computer. However, at present, quantum computers are limited by the development of quantum chip hardware, which leads to the limited number of bits that can be manipulated, so the computing power is limited, and quantum algorithms cannot be generally run. Running quantum algorithms generally requires quantum subtraction. [0003] In the process of realizing quantum algorithms, it is usually necessary to use various quantum logic gates to construct quantum algorithms. However, w...

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Problems solved by technology

[0003] In the process of realizing quantum algorithms, it is usually necessary to use various quantum logic gates to construct quantum algorithms. However, when constructing quantum algorithms only relying on various quantum logic gates, there is no basic arithmetic corresponding to classical operations such as addition, subtraction, multiplication, and division. Quantum logic gates for arithmetic operations

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