Superconducting vortex-based microwave circulator

Patent metadata

Field	Value
Publication number	US-12176593-B2
Application number	US-202117477960-A
Country	US
Kind code	B2
Filing date	Sep 17, 2021
Priority date	Sep 18, 2020
Publication date	Dec 24, 2024
Grant date	Dec 24, 2024

Abstract

A circulator includes a central circuit having a first superconducting island, a second superconducting island, a third superconducting island, and a central island, each in electrical communication with each other via a plurality of Josephson junctions.

First claim

What is claimed is:

1. A method for using a circulator, the method comprising:
operating a circulator in a non-charge-conserved, intermediate regime of Josephson energy,

wherein the circulator includes a central circuit including:
a first superconducting island, a second superconducting island, a third superconducting island, and a central island, each in electrical communication with each other via a plurality of Josephson junctions.

2. The method of claim 1 , wherein the central circuit defines a plane.

3. The method of claim 2 , further comprising threading the central circuit by an external magnetic field applied perpendicular to the plane.

4. The method of claim 1 , wherein the plurality of Josephson junctions include a Josephson energy and a capacitance.

5. The method of claim 1 , wherein the central island includes a central ground.

6. The method of claim 1 , wherein the central island includes a self-capacitance.

7. The method of claim 1 , further comprising capacitively coupling a resonator to each of the first, the second, and the third superconducting islands.

8. The method of claim 7 , further comprising: strongly coupling to each of the first, the second, and the third superconducting islands.

9. The method of claim 1 , further comprising generating persistent current vortexes.

10. A method for operating a circulator, the method comprising:
operating a circulator in a non-charge-conserved, intermediate regime of Josephson energy, wherein the circulator includes:
a plurality of superconducting islands; and
a central island,

wherein the plurality of superconducting islands and the central island are each in electrical communication with each other via a plurality of Josephson junctions.

11. The method of claim 10 , wherein the plurality of superconducting islands define a plane.

12. The method of claim 11 , further comprising threading the circulator by an external magnetic field applied perpendicular to the plane.

13. The method of claim 10 , wherein the plurality of Josephson junctions include a Josephson energy and a capacitance.

14. The method of claim 10 , wherein the central island includes a central ground.

15. The method of claim 10 , wherein the central island includes a self-capacitance.

16. The method of claim 10 , further comprising capacitively coupling a resonator to each of the plurality of superconducting islands.

17. The method of claim 16 , further comprising strongly coupling the resonators to each of the plurality of superconducting islands.

18. A method for using a circulator in a computing system, the method comprising:
operating one or more computing devices in communication with a quantum computing system including a circulator, wherein the circulator comprises:
a first superconducting island, a second superconducting island, a third superconducting island, and a central island, each in electrical communication with each other via a plurality of Josephson junctions; and

operating the circulator in a non-charge-conserved, intermediate regime of Josephson energy.

Assignees

• Univ Maryland
• Government Of The Us Secretary Of Commerce

Inventors

• Richman Brittany
• Taylor Jacob

Classifications

• H10N60/805

  for Josephson-effect devices · CPC title

• H10N60/12

  Josephson-effect devices · CPC title

• G06N10/00

  Quantum computing, i.e. information processing based on quantum-mechanical phenomena · CPC title

• G06N10/40

  Physical realisations or architectures of quantum processors or components for manipulating qubits, e.g. qubit coupling or qubit control · CPC title

• H01P1/383 Primary

  Junction circulators, e.g. Y-circulators · CPC title