Easy-to-expand and high-fidelity superconducting quantum chip structure and operation method

Abstract

The invention relates to an easy-to-expand and high-fidelity superconducting quantum chip structure and an operation method. The superconducting quantum chip structure is characterized by comprising aplurality of adjustable couplers and a plurality of quantum bits; wherein the quantum bits and the adjustable couplers are arranged alternately, and the static frequency of the adjustable couplers, the adjacent quantum bits and the frequencies of the quantum bits adjacent to the same adjustable coupler are located in different frequency bands; each quantum bit is provided with an independent microwave driving line XY, wherein each adjustable coupler is provided with an independent magnetic flux bias line Z, and a single-bit gate, a two-bit gate or a multi-bit controlled phase gate is realizedby applying a driving signal to the microwave driving line XY or the magnetic flux bias line Z. The method can be widely applied to the field of superconducting quantum computing.

Description

technical field [0001] The invention relates to an easily expandable, high-fidelity superconducting quantum chip structure and an operation method, belonging to the field of superconducting quantum computing. Background technique [0002] Compared with other physical solutions to realize quantum computing, the advantage of superconducting quantum computing mainly lies in its stronger scalability. Superconducting quantum computing uses artificial atoms (qubits) as the basic control unit. Although there is no difficulty in principle in manufacturing superconducting quantum chips containing a large number of qubits, more defects will be introduced when expanding superconducting quantum chips, such as Issues such as crosstalk between control lines and multi-bit parasitic coupling affect the fidelity of quantum gates. How to ensure high-fidelity quantum gates while expanding superconducting quantum chips is an important problem to be solved to realize large-scale superconducting...

AI Technical Summary

Problems solved by technology

[0017] In view of the above problems, the purpose of the present invention is to provide an easy-to-expand, high-fidelity superconducting quantum chip structure and operation method, which has the characteristics of easy expansion and high-fidelity, and solves the problem of parasitic coupling in traditional superconducting quantum chips. Serious, serious control signal crosstalk, complex control circuit, slow operation speed of insulation heat, etc.

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