Resonator couplable to alkali atom for qubit generation and entanglement

Patent metadata

Field	Value
Publication number	US-12020120-B2
Application number	US-202318378617-A
Country	US
Kind code	B2
Filing date	Oct 10, 2023
Priority date	Mar 16, 2022
Publication date	Jun 25, 2024
Grant date	Jun 25, 2024

Abstract

A quantum computing system includes a first resonator couplable to a first alkali atom, a second resonator couplable to a second alkali atom, and lasers for trapping, cooling, and manipulating the first alkali atom and the second alkali atom. Detectors detect a presence of the trapped first alkali atom and the trapped second alkali atom, and a processor is configured to receive at least one input signal from at least one of the detectors, the input signal indicating a presence of the trapped first alkali atom and the trapped second alkali atom, and, based on the received input, control at least some of the lasers to manipulate at least one of the trapped first alkali atom and the trapped second alkali atom to thereby generate photonic qubits using the trapped first alkali atom or generate entanglement between photonic qubits transmitted to the trapped second alkali atom.

First claim

The invention claimed is:

1. A quantum computing system, comprising:
a first resonator couplable to a first alkali atom and configured to generate a plurality of photonic qubits;
a second resonator couplable to a second alkali atom and configured to cause entanglement between at least two of the plurality of photonic qubits;
a plurality of lasers configured to:
trap the first alkali atom and the second alkali atom;
cool the first alkali atom and the second alkali atom; and
manipulate the first alkali atom and the second alkali atom;

a plurality of detectors configured to:
detect a presence of the trapped first alkali atom and the trapped second alkali atom; and

at least one processor configured to:
receive at least one input signal from at least one of the plurality of detectors, the at least one input signal indicating a presence of the trapped first alkali atom and the trapped second alkali atom, and, based on the received at least one input, control at least some of the plurality of lasers to manipulate at least one of the trapped first alkali atom and the trapped second alkali atom to thereby generate photonic qubits using the trapped first alkali atom or generate entanglement between photonic qubits transmitted to the trapped second alkali atom.

2. The system of claim 1 , wherein the plurality of detectors are configured to measure photonic qubits.

3. The system of claim 2 , wherein the at least one processor is configured to manipulate measurement bases of subsequent photonic qubits using results of measurements of prior photonic qubits.

4. The system of claim 3 , further comprising a plurality of optical switches, wherein manipulating the measurement bases includes changing states of the plurality of switches.

5. The system of claim 3 , further comprising a plurality of phase shifters, wherein manipulating the measurement bases includes changing states of the plurality of phase shifters.

6. The system of claim 3 , further comprising a plurality of birefringent elements, wherein manipulating the measurement bases includes changing states of the plurality of birefringent elements.

7. The system of claim 2 , wherein the at least one processor is configured to perform a logic operation by selecting the bases for the photonic qubit measurements to measure the photonic qubits.

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

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

10. The system of claim 1 , wherein at least one of the first resonator and the second resonator includes a layer containing silicon.

11. The system of claim 1 , wherein at least one of the first resonator and the second resonator is implemented on or in a chip or in or on a die of a chip.

12. A quantum computing method, comprising:
trapping a first alkali atom and a second alkali atom, wherein the first alkali atom is couplable to a first resonator and the second alkali atom is couplable to a second resonator;
cooling the first alkali atom and the second alkali atom;
manipulating the first alkali atom and the second alkali atom;
detecting a presence of the trapped first alkali atom and the trapped second alkali atom; and
based on at least one input signal indicating a presence of the trapped first alkali atom and the trapped second alkali atom, controlling at least some of a plurality of lasers to manipulate at least one of the trapped first alkali atom and the trapped second alkali atom to thereby generate photonic qubits using the trapped first alkali atom or generate entanglement between photonic qubits transmitted to the trapped second alkali atom.

13. The method of claim 12 , further comprising measuring photonic qubits using a plurality of detectors.

14. The method of claim 13 , further comprising: manipulating measurement bases of subsequent photonic qubits using results of measurements of prior photonic qubits.

15. The method of claim 14 , wherein manipulating the measurement bases includes changing states of a plurality of switches.

16. The method of claim 14 , wherein manipulating the measurement bases includes changing states of a plurality of phase shifters.

17. The method of claim 14 , wherein manipulating the measurement bases includes changing states of a plurality of birefringent elements.

18. The method of claim 13 , further comprising performing a logic operation by selecting the bases for the photonic qubit measurements to measure the photonic qubits.

19. The method of claim 12 , wherein the first alkali atom or the second alkali atom includes a rubidium atom.

20. The method of claim 12 , wherein the first alkali atom or the second alkali atom includes a cesium atom.

21. The method of claim 12 , wherein at least one of the first resonator and the second resonator includes a layer containing silicon.

22. The method of claim 12 , wherein at least one of the first resonator and the second resonator is implemented on or in a chip or in or on a die of a chip.

23. 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:
controlling a plurality of lasers to:
trap a first alkali atom and a second alkali atom, wherein the first alkali atom is couplable to a first resonator and the second alkali atom is couplable to a second resonator;
cool the first alkali atom and the second alkali atom; and
manipulate the first alkali atom and the second alkali atom;

controlling a plurality of detectors to detect a presence of the trapped first alkali atom and the trapped second alkali atom; and
receiving at least one input signal from at least one of the plurality of detectors, the at least one input signal indicating a presence of the trapped first alkali atom and the trapped second alkali atom, and, based on the received at least one input, controlling at least some of the plurality of lasers to manipulate at least one of the trapped first alkali atom and the trapped second alkali atom to thereby generate photonic qubits using the trapped first alkali atom or generate entanglement between photonic qubits transmitted to the trapped second alkali atom.

24. The non-transitory computer-readable storage medium of claim 23 , wherein the method further comprises:
measuring photonic qubits using a plurality of detectors; and
manipulating measurement bases of subsequent photonic qubits using results of measurements of prior photonic qubits.

25. The non-transitory computer-readable storage medium of claim 23 , wherein at least one of the first resonator and the second resonator includes a layer containing silicon.

26. The non-transitory computer-readable storage medium of claim 23 , wherein at least one of the first resonator and the second resonator is implemented on or in a chip or in or on a die of a chip.

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