High-fidelity superconducting circuit structure, superconducting quantum chip and superconducting quantum computer

Abstract

The invention discloses a high-fidelity superconducting circuit structure, a superconducting quantum chip and a superconducting quantum computer, and relates to the field of quantum computing. According to the specific implementation scheme, quantum bits are calculated; the coupling device is used for being coupled with the two calculation quantum bits; the connection assembly is arranged betweenthe calculation quantum bit and the coupling device and is used for carrying out coupling connection on the calculation quantum bit and the coupling device so as to realize a target quantum gate basedon the coupling device and the calculation quantum bit; wherein the calculation quantum bit and the detuning intensity of the coupling device are positive values. In this way, parasitic coupling between the calculation quantum bits is eliminated by selecting reasonable superconducting circuit parameters, and the fidelity of the target quantum gate is improved.

Description

technical field [0001] This application relates to the field of computers, in particular to the field of quantum computing. Background technique [0002] In recent years, quantum computing hardware represented by superconducting circuits has made great progress in terms of performance. The more representative one is that in 2019, the Google AI Quantum team successfully realized a 53-qubit superconducting quantum chip, and in On it, the random circuit sampling task is realized, and then the quantum advantage is demonstrated. Although this technical solution has achieved a certain degree of success, there are still many problems that need to be solved urgently. For example, ZZ parasitic coupling, that is, the change of the state of one calculation qubit will affect the frequency of another calculation qubit. The ZZ parasitic coupling Existence will directly lead to the emergence of quantum gate errors; therefore, how to effectively eliminate the ZZ parasitic coupling between ...

AI Technical Summary

Problems solved by technology

Although this technical solution has achieved a certain degree of success, there are still many problems that need to be solved urgently. For example, ZZ parasitic coupling, that is, the change of the state of one calculation qubit will affect the frequency of another calculation qubit. The ZZ parasitic coupling Existence will directly lead to the emergence of quantum gate errors; therefore, how to effectively eliminate the ZZ parasitic coupling between computing qubits becomes an extremely critical proposition

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