General-purpose quantum computer central processor and a manipulation method thereof

Abstract

The embodiment of the invention discloses a general-purpose quantum computer central processor and a manipulation method thereof, comprising the steps of preparing each qubit to an initial state by adjusting the external magnetic flux of each qubit contained in all basic units and the gate voltage of each qubit, and realizing that the coupling between each qubit is initially zero; Selecting the current qubit coupling mode; Determining a single qubit to be manipulated or two qubits or multiple qubits to be coupled and performing external magnetic flux regulation, gate voltage regulation and microwave pulse action according to the selected current qubit operating mode, or performing external magnetic flux and gate voltage combined regulation on all qubits; Select the next operation and determine the specific manipulation of each qubit. The invention can solve the preparation of the initial states of all qubits in the central processing unit, the manipulation of any single qubit, the coupling and parallel coupling operation between any two qubits and between multiple qubits, and the fidelity is high.

Description

technical field [0001] The invention relates to the technical field of quantum computers, in particular to a general-purpose quantum computer central processing unit and a manipulation method thereof. Background technique [0002] Quantum computers have advantages that classical computers cannot match in some specific problems such as mass factorization and quantum simulation, so they have good application prospects. The core of a quantum computer is the central processing unit, which performs various single-qubit and multi-qubit quantum gate operations that need to be completed by the central processing unit. In the operation of various qubits, the coupling operation between any qubits of the central processing unit is particularly difficult. [0003] At present, the way to realize the coupling operation between arbitrary qubits of the central processing unit to a certain extent is mainly realized by using various cavities as quantum buses. However, the coupling achieved ...

AI Technical Summary

Problems solved by technology

Since it is an approximation, there must be residual interactions, and a large number of residual interactions will affect the fidelity of the quantum gate operation

In order to make the remaining interaction as small as possible, the frequency difference between the qubits and the coupling strength need to meet the higher requirements of the rotation wave approximation. In this way, when the number of qubits is large, it will cause frequency congestion, making the central processing unit The number of medium qubits is difficult to increase

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