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Superconductive microwave nanometer resonant cavity

A resonant cavity, nanotechnology, applied in resonators, waveguide devices, electrical components, etc., can solve the problems of weak coupling between superconducting microwave nano resonators and qubits

Active Publication Date: 2017-05-31
UNIV OF SCI & TECH OF CHINA
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  • Abstract
  • Description
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Problems solved by technology

[0005] In view of this, the present invention provides a superconducting microwave nanoresonator to solve the problem of weak coupling between the superconducting microwave nanoresonator and qubits in the prior art

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  • Superconductive microwave nanometer resonant cavity
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  • Superconductive microwave nanometer resonant cavity

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Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0030] As mentioned in the background technology section, the coupling between the superconducting microwave nanoresonator and the qubit is weak. The inventors found that the reason for the above-mentioned technical problems is that the coupling between the superconducting microwave nanoresonator and the qubit in the prior art All are capacitive coupling, and inductive coupling is not considered, and the inductive coupling is relatively weak, so that technical ...

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Abstract

The invention discloses a superconductive microwave nanometer resonant cavity which comprises a dielectric substrate, two coplanar waveguide ground planes arranged on the same surface of the dielectric surface, a coplanar waveguide transmission line central conduction band line and a nanometer cavity, wherein the coplanar waveguide transmission line central conduction band line is arranged between the two coplanar waveguide ground planes, the nanometer cavity is arranged in areas of the coplanar waveguide ground plane and is arranged on the surface of the dielectric substrate, the line width of the nanometer cavity is of a hundred nanometer level, and an opening is formed in the edge, departing from the coplanar waveguide transmission line central conduction band line, of the nanometer cavity. The opening can reduce capacitance of a circuit formed by the nanometer cavity and the coplanar waveguide transmission line central conduction band line, so as to reduce capacitance coupling; the line width of the nanometer cavity is reduced, so that dynamic inductance is enhanced, high characteristic impedance is generated, and coupling capacity between the superconductive microwave nanometer resonant cavity and a quantum system is enhanced.

Description

technical field [0001] The invention relates to the technical field of microwave circuits, in particular to a superconducting microwave nano-resonator cavity. Background technique [0002] Compared with the optical system, the circuit quantum electrodynamics system can be completely realized on a millimeter-scale circuit chip, using a one-dimensional coplanar waveguide resonant cavity structure to compress the electric field at the strongest electromagnetic field of the coplanar waveguide (that is, the antinode) , to achieve greater electric field strength locally, and the qubits placed at the strongest electric field and the resonant cavity can easily achieve strong coupling through capacitive coupling. [0003] The current general method for manipulating and reading superconducting qubits is: directly couple the qubits to a superconducting microwave nanoresonator with a line width of micron, and a superconducting microwave nanoresonator completes the connection with the qu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P7/06
CPCH01P7/065
Inventor 郭国平杨鑫鑫贾志龙孔伟成段鹏薛光明
Owner UNIV OF SCI & TECH OF CHINA
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