Heralding-free connections in quantum computing

Patent metadata

Field	Value
Publication number	US-12190205-B2
Application number	US-202318299827-A
Country	US
Kind code	B2
Filing date	Apr 13, 2023
Priority date	Apr 27, 2021
Publication date	Jan 7, 2025
Grant date	Jan 7, 2025

Abstract

Systems and methods for a quantum computing include a plurality of photonic processing stages, a plurality of heralding-free connections, and circuitry configured to regulate photon flow between adjacent stages such that decisions about stage settings or flow between adjacent stages are free of input from a previous stage. Each heralding-free connection is located between adjacent photonic processing stages. Each photonic processing stage includes at least two of an optical switch, a beam splitter, a waveguide or a photon generator. Methods include transmitting or receiving a plurality of photons via a plurality of heralding-free connections, and regulating photon flow between adjacent stages such that decisions about stage settings or flow between adjacent stages are free of input from a previous stage.

First claim

The invention claimed is:

1. A quantum computing system, comprising:
a plurality of photonic processing stages, wherein each photonic processing stage includes at least two of an optical switch, a beam splitter, a waveguide or a photon generator;
a plurality of heralding-free connections, each connection being located between adjacent photonic processing stages; and
circuitry configured to regulate photon flow between adjacent stages such that decisions about stage settings or flow between adjacent stages are free of input from a previous stage.

2. The system of claim 1 , wherein the photonic processing stages are separated in a time domain.

3. The system of claim 1 , wherein the photonic processing stages are separated in a spatial domain.

4. The system of claim 1 , wherein decisions about stage settings include settings of the optical switch.

5. The system of claim 1 , wherein the optical switch includes a phase shifter.

6. The system of claim 5 , wherein the decisions about stage settings include settings of the phase shifter.

7. The system of claim 1 , wherein the photon generator includes a quantum emitter coupled to a resonator.

8. The system of claim 1 , wherein at least some of the photonic processing stages include a quantum emitter.

9. The system of claim 8 , wherein the quantum emitter is coupled to a resonator.

10. The system of claim 9 , wherein the quantum emitter is configured to:
entangle a quantum emitter qubit to a photonic qubit when a photonic qubit is transmitted toward the quantum emitter;
map the quantum emitter qubit to a photonic qubit when the photonic qubit is transmitted toward the quantum emitter; or
mediate interactions between consecutive incoming photonic qubits to generate a graph state.

11. The system of claim 8 , wherein the quantum emitter includes a stationary qubit capable of interacting with photons.

12. The system of claim 8 , wherein the quantum emitter includes a superconducting qubit.

13. The system of claim 8 , wherein the quantum emitter includes a quantum dot.

14. The system of claim 8 , wherein the quantum emitter includes at least one of a neutral atom or an ion.

15. The system of claim 14 , wherein the atom is a rubidium atom or the ion is a rubidium ion.

16. The system of claim 14 , wherein the atom is a cesium atom or the ion is a cesium ion.

17. The system of claim 8 , wherein the quantum emitter includes at least one of Strontium, Erbium, Ytterbium, Calcium, Barium, Beryllium, or Magnesium atom.

18. A quantum computing method, comprising:
transmitting or receiving a plurality of photons via a plurality of heralding-free connections, each connection being located between adjacent photonic processing stages, wherein each photonic processing stage includes at least two of an optical switch, a beam splitter, a waveguide, or a photon generator; and
regulating photon flow between adjacent stages such that decisions about stage settings or flow between adjacent stages are free of input from a previous stage.

19. The method of claim 18 , wherein at least some of the photonic processing stages include a quantum emitter coupled to a resonator, and the method further comprises:
entangling a quantum emitter qubit to a photonic qubit when the photonic qubit is transmitted toward the quantum emitter;
mapping a quantum emitter qubit to a photonic qubit when the photonic qubit is transmitted toward the quantum emitter; or
mediating interactions between consecutive incoming photonic qubits to generate a graph state.

20. A non-transitory computer-readable medium including instructions that, when executed by at least one processor, cause the at least one processor to carry out a quantum computing method, comprising:
transmitting or receiving a plurality of photons via a plurality of heralding-free connections, each connection being located between adjacent photonic processing stages, wherein each photonic processing stage includes at least two of an optical switch, a beam splitter, a waveguide, or a photon generator; and
regulating photon flow between adjacent stages such that decisions about stage settings or flow between adjacent stages are free of input from a previous stage.

Assignees

• Quantum Source Labs Ltd
• Yeda Res & Dev

Inventors

• Semo Gil
• Aqua Ziv
• Melamed Oded
• Charash Dan
• Rosenblum Serge
• Dayan Barak

Classifications

• H10D48/383

  Quantum effect devices, e.g. of devices using quantum reflection, diffraction or interference effects · CPC title

• H10H20/812

  within the light-emitting regions, e.g. having quantum confinement structures · CPC title

• G21K5/00

  Irradiation devices (discharge tubes for irradiating H01J37/00) · CPC title

• G06N10/20

  Models of quantum computing, e.g. quantum circuits or universal quantum computers · CPC title

• B82Y10/00

  Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic · CPC title