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

Abstract

The application discloses a high-fidelity superconducting circuit structure, a superconducting quantum chip, and a superconducting quantum computer, and relates to the field of quantum computing. The specific implementation plan is: computing qubits; coupling devices, used to couple with two of the computing qubits respectively; connecting components, arranged between the computing qubits and the coupling devices, for coupling the computing The qubit is coupled to the coupling device to realize a target quantum gate based on the coupling device and the calculation qubit; wherein, the detuning strengths of the calculation qubit and the coupling device are both positive values. In this way, by selecting reasonable superconducting circuit parameters to eliminate the parasitic coupling between the calculation qubits, 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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