Superconducting Universal Quantum Computing Scheme Based On LC Coupling

In recent years,with the continuous deepening of quantum computer research,the realization of universal quantum computing schemes has al-ways been a key goal of people's research.At present,a variety of qubit systems have been proposed for the implementation of quantum comput-ing,including ion traps,photons,quantum dots,and solid superconductors.Among them,the superconducting qubit system with Josephson junction as the main body has attracted the attention of researchers due to its many ad-vantages such as easy expansion,low dissipation and easy processing.So far,many people have proposed large-scale schemes for superconducting qubit systems,and these schemes have also made good progress in experi-ments.For example,Google has recently achieved quantum hegemony in superconducting systems? Zhejiang University has achieved entanglement of twenty qubits.These developments indicate that the superconducting qubit system will be the first to realize a universal quantum computing so-lution.This research focuses on superconducting qubits and focuses on the method of efficiently coupling qubits.The specific research contents in-clude: We propose a multi-qubit coupling scheme with better symmetry,and consider all the coupling conditions of the system to minimize the de-coherence problem caused by the coupling system itself when expanding from a two-qubit system to a multi-qubit system.Our scheme can realize the coupling between any two qubits.This is a scheme that only uses LC coupling as a bus to couple qubits together,so it can simplify the opera-tion process of logic gates,improve the operation efficiency of logic gates,and provide a certain theory for the physical realization of superconducting qubit systems guide.