Quantum chip and method capable of coupling multiple quantum bits by using regulatable quantum data bus

Abstract

The present invention provides a quantum chip and a method capable of coupling multiple quantum bits by using a regulatable quantum data bus, pertaining to the field of microwave circuits. The quantumchip comprises a substrate, and a classic data bus and the quantum bits printed on the substrate, and the classic data bus comprises an input port and an output port. The regulatable quantum data buscomprises a half-wavelength coplanar waveguide resonant cavity and a resonant cavity resonant frequency regulating component, the regulatable quantum data bus is connected with the quantum bits via coupling structures, and the resonant cavity resonant frequency regulating component is arranged at the central position of the regulatable quantum data bus. One end of each reading resonant cavity ofeach quantum bit is connected with the classic data bus, and the other end of each reading resonant cavity is connected with the corresponding quantum bit. The quantum chip and the method can match signals of a specified frequency in regulating / reading signals with the corresponding quantum bits / reading resonant cavities, and thus the quantum chip and the method can greatly facilitate the regulation and the signal processing of a multiple quantum bit chip.

Description

technical field

[0001] The invention belongs to the field of microwave circuits, and in particular relates to a quantum chip using an adjustable quantum data bus to couple multiple qubits. Background technique

[0002] At present, the mainstream solid-state quantum chip research teams in the world have entered the development stage of multi-qubit integration. Many top teams have successively proposed their own integration solutions. Each integration scheme has its own defects, which are mainly reflected in two aspects. One is that the increase in chip complexity leads to a decrease in its performance, and the other is that the increase in the number of qubits increases the demand for hardware measurement and control systems. Especially for the latter, if each qubit requires a separate reading and control channel, then the scale of the entire quantum chip measurement and control platform must be increased in proportion, consuming a lot of resources and manpower. We hope to ...

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