Long-service-life storage device and long-service-life storage method for superconducting quantum bits

Abstract

The invention discloses a long-life storage device and a long-service-life storage method for superconducting quantum bits. The three-dimensional ellipsoid radio frequency superconducting thin film cavity with high quality factor is adopted, and compared with a currently used rectangular cavity, the three-dimensional ellipsoid radio frequency superconducting thin film cavity has the advantages that the quality factor reaches up to 1010; the superconductive quantum bits are coupled with the superconductive cavity, and the decorrelation time of the superconductive quantum bits is prolonged to a hundred milliseconds to second order, so that obstacles are cleared for realizing control and measurement of the quantum bits and quantum storage; according to the method, the superconducting quantum bits with long service life can be obtained, and the device method have important significance for quantum calculation, quantum storage, quantum information, quantum communication and other aspects; the three-dimensional ellipsoid radio frequency superconducting thin film cavity is applied to superconducting quantum calculation for the first time, a mature superconducting cavity technology and emerging superconducting quantum calculation are combined, and the superconducting quantum calculation is further extrapolated forwards.

Description

technical field [0001] The invention relates to superconducting quantum computing, in particular to a superconducting qubit long-life storage device and a storage method thereof. Background technique [0002] Qubit is the basic unit of quantum computing, and its physical realization mainly includes nuclear magnetic resonance, ion trap, semiconductor quantum dot, light quantum and superconducting quantum circuit, etc. As a solid-state macroscopic quantum circuit, superconducting quantum circuits use superconducting qubits as the basic unit, and superconducting qubits are represented by superconducting Josephson junctions. Strong mutual coupling strength and scalability are very promising for the physical realization of quantum computing. The most important factor restricting superconducting quantum computing is the short decoherence time of superconducting qubits. In recent years, with the development of various technologies and the deepening of research, the coherence time ...

AI Technical Summary

Problems solved by technology

The existing technology uses a rectangular cavity to store superconducting qubits. The rectangular cavity includes two half-cavities. The qubit is first placed in one half-cavity, and then the other half-cavity is fastened. The two half-cavities are mechanically pressed together to form Rectangular cavity, the intermediate connection is sealed by screw compression, and the microwave loss generated is large

At the same time, the existing rectangular cavity structure and processing are not optimized, so its quality factor is only 10 6 Under the cavity shape design and post-processing conditions of the existing rectangular cavity, it is unlikely that the quality factor will be further improved

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