N-configuration resonator-coupled quantum emitter

Patent metadata

Field	Value
Publication number	US-12198012-B2
Application number	US-202318299821-A
Country	US
Kind code	B2
Filing date	Apr 13, 2023
Priority date	Apr 27, 2021
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

A quantum computing system, method, and computer readable medium involves initializing a state of a resonator-coupled quantum emitter having at least four levels arranged in an N-configuration, the N-configuration having a first ground state, a second ground state, a first excited state and a second excited state. A frequency of a first transition between the first ground state and the first excited state is tuned, a frequency of a second transition between the second ground state and the second excited state is tuned, and a frequency of a third transition between the second ground state and the first excited state is tuned. A plurality of photons are fed at a frequency corresponding to the frequency of the second transition, thereby entangling the plurality of photons to the resonator-coupled quantum emitter. Likewise, a photon at a frequency corresponding to the frequency of at least one of the first transition or the third transition is fed, thereby mapping a state of the resonator-coupled quantum emitter into a photon.

First claim

The invention claimed is:

1. A quantum computing method, comprising:
initializing a state of a resonator-coupled quantum emitter having at least four levels arranged in an N-configuration, the N-configuration having a first ground state, a second ground state, a first excited state and a second excited state;
tuning a frequency of a first transition between the first ground state and the first excited state;
tuning a frequency of a second transition between the second ground state and the second excited state;
tuning a frequency of a third transition between the second ground state and the first excited state;
feeding a plurality of photons at a frequency corresponding to the frequency of the second transition, thereby entangling the plurality of photons to the resonator-coupled quantum emitter; and
feeding a photon at a frequency corresponding to the frequency of at least one of the first transition or the third transition, thereby mapping a state of the resonator-coupled quantum emitter into a photon.

2. The method of claim 1 , wherein the state of a resonator-coupled quantum emitter is an electronic state, a nuclear state, or a combination thereof.

3. The method of claim 1 , wherein the tuning of the frequencies of the first transition, the second transition and the third transition occur before the initializing.

4. The method of claim 1 , wherein the tuning of one or more of the frequencies of the transitions occurs by light-shift using a laser.

5. The method of claim 1 , wherein the tuning of one or more of the frequencies of the transitions occurs by Zeeman shift through application of a magnetic field.

6. The method of claim 1 , wherein feeding a photon at a frequency corresponding to the frequency of at least one of the first transition or the third transition further initializes the resonator-coupled quantum emitter to correspond to at least one of the first ground state or the second ground state.

7. The method of claim 1 , wherein feeding a plurality of photons includes sequentially feeding a plurality of single photons.

8. The method of claim 1 , wherein the initializing of the state of the resonator-coupled quantum emitter includes preparing the resonator-coupled quantum emitter in a superposition state of the first ground state and the second ground state.

9. The method of claim 8 , wherein the superposition state is an equal superposition of the first ground state and the second ground state.

10. The method of claim 1 , wherein the resonator-coupled quantum emitter includes two resonators coupled to a single quantum emitter.

11. The method of claim 1 , wherein the quantum emitter includes a stationary qubit capable of interacting with photons.

12. The method of claim 1 , wherein the quantum emitter includes one of a superconducting qubit or a quantum dot.

13. The method of claim 1 , wherein the quantum emitter includes a neutral atom.

14. The method of claim 1 , wherein the quantum emitter includes an ion.

15. The method of claim 1 , wherein the quantum emitter includes at least one of a rubidium atom or a cesium atom.

16. The method of claim 1 , wherein the quantum emitter includes at least one of Strontium, Erbium, Ytterbium, Calcium, Barium, Beryllium, or Magnesium atom.

17. A quantum computing system, comprising:
a resonator-coupled quantum emitter having at least four levels arranged in an N-configuration, the N-configuration having a first ground state, a second ground state, a first excited state and a second excited state; and
circuitry configured to:
initialize a state of the resonator-coupled quantum emitter;
tune a frequency of a first transition between the first ground state and the first excited state;
tune a frequency of a second transition between the second ground state and the second excited state;
tune a frequency of a third transition between the second ground state and the first excited state;
feed a plurality of photons at a frequency corresponding to the frequency of the second transition, thereby entangling the plurality of photons to the resonator-coupled quantum emitter; and
feed a photon at a frequency corresponding to a frequency of at least one of the first transition or the third transition, thereby mapping a state of the resonator-coupled quantum emitter into a photon.

18. The system of claim 17 , further comprising at least one of:
a laser for light-shifting, thereby tuning at least one of the frequencies of the transitions; or
a magnetic field generator for providing a magnetic field, application of the magnetic field for tuning at least one of the frequencies of the transitions.

19. The system of claim 17 , wherein the resonator-coupled quantum emitter includes two resonators coupled to a single quantum emitter.

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:
initializing a state of a resonator-coupled quantum emitter having at least four levels arranged in an N-configuration, the N-configuration having a first ground state, a second ground state, a first excited state and a second excited state;
tuning a frequency of a first transition between the first ground state and the first excited state;
tuning a frequency of a second transition between the second ground state and the second excited state;
tuning a frequency of a third transition between the second ground state and the first excited state;
feeding a plurality of photons at a frequency corresponding to the frequency of the second transition, thereby entangling the plurality of photons to the resonator-coupled quantum emitter; and
feeding a photon at a frequency corresponding to the frequency of at least one of the first transition or the third transition, thereby mapping a state of the resonator-coupled quantum emitter into a photon.

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