Universal quantum computer central processor operating method

Abstract

An embodiment of the invention discloses a universal quantum computer central processor operating method. The universal quantum computer central processor operating method comprises the steps of: preparing quantum bits into an initial state through adjusting external magnetic fluxes and gate voltages of the quantum bits contained in all basic units, and realizing the effect that coupling among thequantum bits is initialized to be 0; selecting a current quantum bit coupling mode; determining quantum bits to be coupled and connected according to the selected current quantum bit coupling mode, and performing corresponding external magnetic flux adjustment on the quantum bits to be coupled and connected and other quantum bits separately; and selecting a next operation, and determining specific operation for the quantum bits according to the selected current operation. By implementing the universal quantum computer central processor operating method, the coupling operation between two arbitrary quantum bits and the parallel coupling operation among multiple quantum bits can be solved, and the quantum state fidelity obtained through coupling is high.

Description

technical field [0001] The invention relates to the technical field of quantum computers, in particular to a method for manipulating a central processing unit of a general-purpose quantum computer. Background technique [0002] Quantum computers based on superposition and entanglement of quantum states have incomparable advantages over classical computers in solving some specific problems such as cryptanalysis and mass search. The huge potential has attracted governments of various countries and many large technology companies to invest in research and release research plans. [0003] At present, there are many physical systems that can realize quantum computing, such as optical systems, ion traps, quantum dots, and superconducting quantum circuits. Among them, the quantum circuit based on the Josephson effect has become one of the internationally recognized physical carriers that are expected to realize quantum computing due to its advantages in manipulability and scalabil...

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Problems solved by technology

However, the fidelity of these coupling methods through the quantum bus is much lower than that of the direct capacitive coupling, especially when more than three multi-qubits are coupled, the interference caused by the interaction between the qubits is very large, and the multi-qubits The fidelity of the quantum state obtained by the system after multiple coupling operations is low

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