Photonic quantum computation with dirty photons

Patent metadata

Field	Value
Publication number	US-12159200-B2
Application number	US-202318299815-A
Country	US
Kind code	B2
Filing date	Apr 13, 2023
Priority date	Apr 27, 2021
Publication date	Dec 3, 2024
Grant date	Dec 3, 2024

Abstract

Systems and methods for generating photonic graph states for quantum computing include coupling a quantum emitter to a cavity, generating a first dirty photon having a first temporal profile, using the first dirty photon to form a first photonic qubit, generating a second dirty photon having a second temporal profile, using the second dirty photon to form a second photonic qubit, using the quantum emitter coupled to the cavity to entangle the first photonic qubit with the second photonic qubit to form a pair of entangled photonic qubits, and using the pair of entangled photonic qubits for quantum computation.

First claim

The invention claimed is:

1. A method of generating photonic graph states for quantum computing, the method comprising:
coupling a quantum emitter to a cavity;
generating a first dirty photon having a first temporal profile;
using the first dirty photon to form a first photonic qubit;
generating a second dirty photon having a second temporal profile;
using the second dirty photon to form a second photonic qubit;
using the quantum emitter coupled to the cavity to entangle the first photonic qubit with the second photonic qubit to form a pair of entangled photonic qubits; and
using the pair of entangled photonic qubits for quantum computation.

2. The method of claim 1 , wherein the method further comprises using the cavity coupled to the quantum emitter to entangle a plurality of additional photons to generate a photonic graph.

3. The method of claim 2 , wherein at least some of the additional photons are dirty.

4. The method of claim 1 , further comprising:
generating a third dirty photon having a third temporal profile different from the first and second temporal profiles;
using the third dirty photon to form a third photonic qubit;
using the quantum emitter coupled to the cavity to entangle the third photonic qubit with the first or second photonic qubit, to form three entangled photonic qubits; and
wherein the using the pair of entangled photonic qubits for quantum computation includes using the three entangled photonic qubits for quantum computation.

5. The method of claim 1 , wherein the first dirty photon and the second dirty photon are generated by extraction from a coherent laser pulse using a quantum emitter coupled to a cavity.

6. The method of claim 1 , wherein the first dirty photon and the second dirty photon are each part of a graph, and wherein the graph contains photonic qubits lacking quantum emitter qubits, or photonic and quantum emitter qubits.

7. The method of claim 1 , wherein at least one of the first dirty photon and the second dirty photon are obtained from an optical delay line.

8. The method of claim 1 , wherein spectra of the first dirty photon and the second dirty photon are within an interaction bandwidth of the quantum emitter coupled to the cavity.

9. The method of claim 1 , wherein at least one of the first dirty photon and the second dirty photon are generated from a fluctuating quantum emitter.

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

11. The method of claim 1 , wherein the quantum emitter includes a superconducting qubit.

12. The method of claim 1 , wherein the quantum emitter includes a quantum dot.

13. The method of claim 1 , wherein the quantum emitter includes at least one of an atom or an ion.

14. The method of claim 13 , wherein the atom or the ion is sourced from rubidium.

15. The method of claim 13 , the atom or the ion is sourced from cesium.

16. The method of claim 13 , wherein the quantum emitter includes at least one of Strontium, Erbium, Ytterbium, Calcium, Barium, Beryllium, or Magnesium atom.

17. The method of claim 1 , wherein the second temporal profile is different from the first temporal profile.

18. The method of claim 1 , wherein the second temporal profile is the same as the first temporal profile.

19. A system for generating photonic graph states for quantum computing, the system comprising:
a cavity;
a quantum emitter couplable to the cavity;
a photon generator configured to generate dirty photons; and
circuitry configured to:
couple the quantum emitter to the cavity;
control the photon generator to generate a first dirty photon having a first temporal profile;
use the first dirty photon to form a first photonic qubit;
control the photon generator to generate a second dirty photon having a second temporal profile;
use the second dirty photon to form a second photonic qubit;
use the quantum emitter coupled to the cavity to entangle the first photonic qubit with the second photonic qubit to form a pair of entangled photonic qubits; and
use the pair of entangled photonic qubits for quantum computation.

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 method of generating photonic graph states for quantum computing, comprising:
coupling a quantum emitter to a cavity;
generating a first dirty photon having a first temporal profile;
using the first dirty photon to form a first photonic qubit;
generating a second dirty photon having a second temporal profile;
using the second dirty photon to form a second photonic qubit;
using the quantum emitter coupled to the cavity to entangle the first photonic qubit with the second photonic qubit to form a pair of entangled photonic qubits; and
using the pair of entangled photonic qubits for quantum computation.

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