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Ground state acquisition method and device of quantum system, equipment and storage medium

An acquisition method and technology for quantum states, applied in the quantum field, can solve difficult problems and achieve the effect of improving operability

Active Publication Date: 2021-09-17
TENCENT TECH (SHENZHEN) CO LTD
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  • Ground state acquisition method and device of quantum system, equipment and storage medium

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[0024] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0025] Explanation of some key terms involved in this application.

[0026] 1. Quantum computing: Based on quantum logic computing, the basic unit of data storage is the quantum bit (qubit).

[0027] 2. Qubit: The basic unit of quantum computing. Traditional computers use 0 and 1 as the basic units of binary. The difference is that quantum computing can process 0 and 1 at the same time, and the system can be in a linear superposition state of 0 and 1: |ψ>=α|0>+β|1>, here α, β represent the system on 0 and 1 Complex probability amplitudes. Their modular square |α| 2 , |β| 2 are probabilities of 0 and 1, respectively.

[0028] 3. Quantum circuit: also known as quantum circuit, a representation of quantum general-purpose compu...

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Abstract

The invention discloses a ground state acquisition method and device of a quantum system, equipment and a storage medium, and relates to the technical field of quantum. The method comprises the following steps: preparing an initial state of a target quantum system; performing n steps of evolution and post-processing on the target quantum system, wherein the kth step of evolution comprises evolving the kth step of input quantum state to obtain a kth step of evolution final state, and the kth step of post-processing comprises removing the influence of auxiliary quantum bits used by the kth step of evolution from the kth step of evolution final state to obtain a kth step of output quantum state; and obtaining an nth-step of output quantum state obtained through the n-step of evolution and post-processing, and obtaining a ground state of the target quantum system. According to the quantum simulation algorithm based on the non-Hermite process, the ground state of a quantum system is simulated, the effect of virtual-real evolution is achieved through real-time unitary evolution related to the Hamiltonian of the system, ground state simulation is clearly and clearly achieved theoretically, the process can be directly achieved through a quantum circuit, and the operability of the scheme is improved.

Description

technical field [0001] The embodiments of the present application relate to the field of quantum technology, and in particular to a method, device, equipment, and storage medium for obtaining a ground state of a quantum system. Background technique [0002] The ground state of a quantum system refers to the eigenstate with the lowest energy of the quantum system. Obtaining the ground state of a quantum system means obtaining the most stable state of the quantum system, which has important applications in many researches. [0003] In related technologies, a scheme for solving the ground state of a quantum system based on virtual time evolution is provided. The theory for solving the ground state of this scheme is very clear, which makes the process of approaching the ground state theoretically guaranteed. but its use of e -Hτ It is non-unitary and cannot be directly decomposed into single-bit gates or double-bit gates that can be used in quantum circuits, making this schem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06N10/00
CPCG06N10/00G06N10/60G06N10/20
Inventor 陈玉琴张士欣张胜誉
Owner TENCENT TECH (SHENZHEN) CO LTD
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