A general quantum computer central processor and its manipulation method

Abstract

The embodiment of the present invention discloses a general-purpose quantum computer central processor and its operating method, including 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, Realize that the coupling between each qubit is initially 0; select the current qubit coupling mode; determine the single qubit to be manipulated or the two or more qubits to be coupled and connected according to the selected current qubit operation mode and perform external Magnetic flux adjustment, gate voltage adjustment, and microwave pulse action, or joint adjustment of external magnetic flux and gate voltage for all qubits; choose the next step and determine the specific manipulation of each qubit. The implementation of the present invention can solve the preparation of the initial state of all qubits in the central processing unit, the manipulation of any single qubit, the coupling between any two qubits and between multiple qubits, and the parallel coupling operation, 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 incomparable advantages in some specific problems such as large prime factorization and quantum simulation, so they have good application prospects. The core of a quantum computer is the central processing unit, which executes various single-qubit and multi-qubit quantum gate operations that need to be completed by the central processing unit. Among the operations of various qubits, the coupling operation between arbitrary 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 by this ...

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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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