Automatic design method and device of superconducting quantum chip readout cavity and storage medium

Abstract

The invention provides an automatic design method and device for a superconducting quantum chip reading cavity and a storage medium. The method comprises the following steps: determining the length of a CPW resonator according to the initial design frequency of a readout cavity; configuring a layout template and a simulation template, wherein the layout template and the simulation template are used for configuring geometric figure coordinates and size parameters of the CPW resonator and reading modeling parameters and simulation parameters of the cavity; constructing a simulation model of the readout cavity with the interdigital capacitor structure based on the layout template and the simulation template, performing spectrum scanning analysis, and determining simulation frequency; in response to the situation that the difference value between the simulation frequency and the initial design frequency is larger than an iteration threshold value, the initial design frequency is adjusted with a preset frequency offset, and the layout template and the simulation template are updated; and performing iterative analysis based on the updated layout template and the simulation template, and outputting the current layout template in response to the condition that the difference value between the obtained simulation frequency and the initial design frequency is less than or equal to an iterative threshold value. According to the method, the simulation model can be quickly generated, and a more accurate read-out cavity layout can be obtained.

Description

technical field [0001] The invention relates to the field of simulation design, in particular to an automatic design method, device and storage medium for a readout chamber of a superconducting quantum chip. Background technique [0002] The superconducting quantum chip is the core device in the superconducting quantum computing hardware system. All qubits are integrated on the chip, and quantum logic gate operations are performed through microwave control to realize quantum computing. The key circuit components of a superconducting quantum chip include a Josephson junction and a readout cavity. The Josephson junction is used to encode qubits based on the quantum tunneling effect, and the readout cavity is a quarter-wavelength CPW (Coplanar waveguide , that is, coplanar waveguide) resonators for measuring the states of qubits in the dispersion limit. In the structure of the superconducting quantum chip, the short-circuit end of the readout cavity or a certain section in the...

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Problems solved by technology

This causes the detuning to move from the dispersive region to the near-resonant region, causing measurement errors

[0005] 2) Replacing the measured frequency with the simulated frequency of the readout cavity requires the simulation model to be close to the real conditions. However, the automatic design of the readout cavity of the existing superconducting quantum chip can only export the project file. The project file is similar to a parameter record table, which only The geometry parameters of the meandering distribution of the CPW resonator on the surface of the metal layer of the simulation model of the readout cavity also need to be artificially supplemented by setting conditions such as thickness, material, boundary, port, frequency sweep, and visualization to improve the simulation model. During the multi-round iterative modeling process of the readout cavity, it is necessary to repeat the operation steps of setting thickness, material, boundary, port, frequency sweep, visualization and other conditions many times, which will increase the modeling time and introduce human errors

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