A long-life storage device and storage method for superconducting qubits

Abstract

The invention discloses a superconducting qubit long-life storage device and a storage method thereof. The present invention adopts a three-dimensional ellipsoid radio frequency superconducting film cavity with a high quality factor, which has great advantages compared with the currently used rectangular cavity: the quality factor is as high as 10 10 ; and the superconducting qubit is coupled with the superconducting cavity, and the decoherence time of the superconducting qubit is increased to the order of hundreds of milliseconds to seconds, thereby clearing the way for the realization of the manipulation, measurement and quantum storage of the qubit; The invention will be beneficial to obtain long-life superconducting qubits, which are of great significance to quantum computing, quantum storage, quantum information and quantum communication; the invention is the first to apply a three-dimensional ellipsoidal radio frequency superconducting thin film cavity to superconducting quantum In computing, the mature superconducting cavity technology is combined with the emerging superconducting quantum computing to push superconducting quantum computing a step forward.

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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