Co-planar waveguide flux qubits
AssigneeGoogle Inc.
InventorsYu CHEN, John MARTINIS, Daniel Thomas SANK, Alireza Shabani BARZEGAR
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Abstract
A qubit device includes an elongated thin film uninterrupted by Josephson junctions, a quantum device in electrical contact with a proximal end of the elongated thin film, and a ground plane that is co-planar with the elongated thin film and is in electrical contact with a distal end of the elongated thin film, in which the thin film, the quantum device, and the ground plane comprise a material that is superconducting at a designed operating temperature.
Claims25
A qubit device comprising:
- an elongated thin film uninterrupted by Josephson junctions;
- a superconducting quantum interference device (SQUID) in electrical contact with a proximal end of the elongated thin film, wherein the SQUID comprises less than three Josephson junctions;
- and
- a ground plane that is co-planar with the elongated thin film and is in electrical contact with a distal end of the elongated thin film,
- wherein the thin film, the SQUID, and the ground plane comprise a material that is superconducting at a designed operating temperature.
(canceled)
A qubit device comprising:
- an elongated thin film uninterrupted by Josephson junctions and comprising a first section extending along a first direction and a second section extending along a second direction;
- a quantum device in electrical contact with the elongated thin film at a position between the first and second section, wherein the quantum device comprises less than three Josephson junctions;
- and
- a ground plane that is co-planar with the elongated thin film and is in electrical contact with the elongated thin film;
- wherein the thin film, the quantum device, and the ground plane comprise a material that is superconducting at a designed operating temperature.
A qubit control system comprising:
- a qubit device comprising (a) an elongated thin film uninterrupted by Josephson junctions, (b) a superconducting quantum interference device (SQUID) in electrical contact with a proximal end of the elongated thin film, wherein the SQUID comprises less than three Josephson junctions, and (c) a ground plane that is co-planar with the elongated thin film and is in electrical contact with a distal end of the elongated thin film,
- wherein the thin film, the SQUID, and the ground plane comprise a material that is superconducting at a designed operating temperature;
- a qubit bias control device adjacent to the elongated thin film such that the qubit bias control device is electrically coupled to the elongated thin film during operation;
- and
- a SQUID bias control device adjacent to the SQUID of the qubit device such that the SQUID bias control device is inductively coupled to the SQUID during operation.
(canceled)
A quantum processor comprising:
- a plurality of co-planar waveguide flux qubit devices, each co-planar waveguide flux qubit device comprising (a) an elongated thin film waveguide uninterrupted by Josephson junctions, (b) a quantum device in electrical contact with a first end of the elongated thin film waveguide, wherein the quantum device comprises less than three Josephson junctions and (c) a ground plane that is co-planar with the elongated thin film waveguide and is in electrical contact with the elongated thin film, wherein each co-planar waveguide flux qubit device is operatively coupled to each other co-planar waveguide flux qubit device in the quantum processor.
Dependencies are inferred from the claim text.