Detectors, optical switches, and waveguides

Patent metadata

Field	Value
Publication number	US-12190206-B2
Application number	US-202318300644-A
Country	US
Kind code	B2
Filing date	Apr 14, 2023
Priority date	Mar 16, 2022
Publication date	Jan 7, 2025
Grant date	Jan 7, 2025

Abstract

A quantum computing system, method and computer readable medium involve a vacuum enclosure for sustaining a vacuum below 10−3 millibar, optical resonators tuned to a resonance of an alkali atom, and a trapping laser for maintaining the alkali atom within a mode of the optical resonators. An atom excitation laser induces photon emissions, a plurality of waveguides couple photons to and from the optical resonators, and a plurality of detectors detect a presence or absence of an atom-resonator coupling. A processor receives output signals from the detectors and controls optical switches for switching between two or more of the plurality of waveguides.

First claim

The invention claimed is:

1. A quantum computing system, comprising:
a vacuum enclosure configured to sustain a vacuum below 10 −3 millibar;
a plurality of optical resonators tuned to a resonance of an alkali atom;
at least one trapping laser for maintaining the alkali atom within a mode of the optical resonators;
an atom excitation laser for inducing photon emissions;
a plurality of waveguides configured to couple photons to and from the optical resonators;
a plurality of detectors configured to detect a presence or absence of an atom-resonator coupling;
a plurality of optical switches for switching between at least two of the plurality of waveguides;
at least one processor configured to:
receive output signals from the plurality of detectors and control the plurality of optical switches.

2. The system of claim 1 , wherein the at least one processor is configured to control the plurality of optical switches to selectively associate between at least two of the plurality of waveguides coupled to an atom-coupled optical resonator.

3. The system of claim 1 , wherein the plurality of optical resonators includes at least three optical resonators.

4. The system of claim 1 , wherein the plurality of optical resonators is implemented with a Photonic Integrated Circuit (PIC).

5. The system of claim 1 , wherein the plurality of waveguides is implemented with Silicon Nitride (SiN).

6. The system of claim 1 , wherein the plurality of waveguides includes a free space.

7. The system of claim 1 , wherein the plurality of waveguides includes an optical fiber.

8. The system of claim 1 , wherein the alkali atom includes a rubidium atom.

9. The system of claim 1 , wherein the alkali atom includes a cesium atom.

10. The system of claim 1 , wherein the plurality of optical switches is controlled to switch between the at least two of the plurality of waveguides at a time resolution of less than 1 microsecond.

11. The system of claim 1 , wherein at least one of the plurality of waveguides includes at least one photonic delay line configured to synchronize between photonic processing stages, the at least one photonic delay line located downstream of at least one of the plurality of optical resonators.

12. The system of claim 11 , wherein the at least one processor is configured to control at least one of the plurality of optical switches to selectively associate between at least one of the plurality of waveguides coupled to an atom-coupled optical resonator and the at least one photonic delay line, thereby controlling passage of at least one photon through the at least one photonic delay line.

13. A quantum computing method, comprising
sustaining a vacuum below 10 −3 millibar;
tuning a plurality of optical resonators to a resonance of an alkali atom;
maintaining the alkali atom within a mode of the optical resonators using at least one trapping laser;
inducing photon emissions using an atom excitation laser;
detecting a presence or absence of an atom-resonator coupling using a plurality of detectors;
receiving output signals from the plurality of detectors; and
controlling a plurality of optical switches to switch between a plurality of waveguides configured to couple photons to and from the optical resonators.

14. The method of claim 13 , wherein the controlling a plurality of optical switches includes controlling to selectively associate between at least two waveguides coupled to an atom-coupled optical resonator.

15. The method of claim 13 , wherein the plurality of optical resonators include at least three optical resonators.

16. The method of claim 13 , wherein the alkali atom includes a rubidium atom or a cesium atom.

17. The method of claim 13 , wherein the controlling of the plurality of optical switches includes controlling to switch between the at least two of the plurality of waveguides at a time resolution of less than 1 microsecond.

18. The method of claim 13 , further comprising synchronizing between photonic processing stages using at least one delay line located downstream of at least one of the plurality of the optical resonators.

19. The method of claim 18 , wherein the controlling a plurality of optical switches include controlling to selectively associate between at least one of the plurality of waveguides coupled to an atom-coupled optical resonator and the at least one photonic delay line, thereby controlling passage of at least one photon through the at least one photonic delay line.

20. A non-transitory computer-readable storage medium including instructions that, when executed by at least one processor, cause the at least one processor to carry out a quantum computing method, the method comprising:
sustaining a vacuum below 10 −3 millibar;
tuning a plurality of optical resonators to a resonance of an alkali atom;
maintaining the alkali atom within a mode of the optical resonators using at least one trapping laser;
inducing photon emissions using an atom excitation laser;
detecting a presence or absence of an atom-resonator coupling using a plurality of detectors;
receiving output signals from the plurality of detectors; and
controlling a plurality of optical switches to switch between a plurality of waveguides configured to couple photons to and from the optical resonators.

Assignees

• Quantum Source Labs Ltd
• Yeda Res & Dev

Inventors

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

Classifications

• G21K1/30

  for confining neutral particles or handling confined neutral particles, e.g. atom traps · CPC title

• G02F1/3131

  in optical fibres · CPC title

• H01S3/042

  for solid state lasers {(H01S3/0401 takes precedence)} · CPC title

• G06N10/40 Primary

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

• G21K1/006

  Physics · mapped topic