System and method for quantum information transfer between optical photons and superconductive qubits

Patent metadata

Field	Value
Publication number	US-9350460-B2
Application number	US-201313868846-A
Country	US
Kind code	B2
Filing date	Apr 23, 2013
Priority date	Apr 23, 2013
Publication date	May 24, 2016
Grant date	May 24, 2016

Abstract

An electro-optical system for exchanging quantum information between optical qubits and including a superconductive microwave cavity; an electro-optical material; a superconductive qubit circuit formed on the electro-optical material including a superconductive qubit; a dipole antenna, formed on the electro-optical material for directly coupling the superconductive qubit to the superconductive microwave cavity; an optical input for receiving input optical photons; a microwave input for receiving input microwave photons; and an optical output for outputting modulated optical photons, wherein a frequency and a phase of the optical photon is modulated with a state of the superconducting qubit by the dipole antenna.

First claim

The invention claimed is:

1. An electro-optical system for directly exchanging quantum information between optical qubits and superconducting qubits comprising:
a superconducting microwave cavity;
an electro-optic material positioned inside of the superconductive microwave cavity for directly coupling optical photons to the superconducting qubits;
a superconducting qubit circuit formed on the electro-optic material including a 3-dimensional (3D) superconducting qubit having two electrodes;
a dipole antenna, formed on the electro-optical material by the two electrodes attached to the superconducting qubit circuit and including a Josephson junction, for directly coupling the 3D superconducting qubit to the superconducting microwave cavity;
an optical photon input for receiving input optical photons;
a microwave photon input for receiving input microwave photons;
a microwave photon output for outputting microwave photons; and
an optical photon output for outputting optical photons that are entangled with the 3D superconducting qubit or that are modulated by a state of the 3D superconducting qubit to directly transfer quantum information between optical and microwave photons.

2. The electro-optical system of claim 1 , wherein the electro-optical material is in a shape of a circular disk and is configured to accommodate whispering gallery modes at multiple frequencies.

3. The electro-optical system of claim 2 , wherein the electro-optic material forms an optical cavity.

4. The electro-optical system of claim 1 , wherein the superconducting microwave cavity comprises superconducting material.

5. The electro-optical system of claim 1 , wherein the input microwave photons are generated by a microwave source.

6. The electro-optical system of claim 1 , further comprising an optical fiber for carrying the input optical photons and the modulated optical photons.

7. The electro-optical system of claim 1 , further comprising a plurality of electro-optical materials each shaped as a circular disk and positioned inside of the superconductive microwave cavity.

8. A method for directly exchanging quantum information between optical qubits and superconducting qubits, the method comprising:
receiving an optical photon via an optical fiber,
storing the received optical photon in an optical cavity;
receiving a microwave photon via a microwave input port;
storing the received microwave photon in a 3-dimensional (3D) superconducting qubit;
directly coupling the received optical photon to a voltage at the 3 superconducting qubit using an electro-optic effect of the optical cavity;
modulating a frequency of the received optical photon by the direct coupling; and
outputting the modulated optical photon in a fiber optic line to directly transfer quantum information between said optical photon and said microwave photon.

9. The method of claim 8 , wherein the superconducting qubit is formed on an optical cavity that is made of electro-optical material.

10. The method of claim 8 , wherein the superconducting microwave cavity comprises superconducting material.

11. The method of claim 8 , further comprising receiving the modulated optical photon via the fiber optic line for further quantum processing of the modulated optical photon.

12. A method for directly exchanging quantum information between optical qubits and superconducting qubits, the method comprising:
receiving optical pump signals comprising a plurality of optical photons, at a frequency of ω a +ω b ;
activating an electro-optic effect between an optical cavity formed by an electro-optical material at a frequency of ω a and a 3-dimensional (3D) superconducting qubit at a frequency of ω b , by the received optical pump signals
directly converting the received optical photons at a frequency of ω a +ω b into an entangled pair of optical photons at a frequency of ω a and the 3D superconducting qubit at a frequency of ω b ; and
outputting the entangled pair via an optical output port to directly transfer quantum information between optical and microwave photons.

13. The method of claim 12 , wherein the electro-optical material is in a shape of a circular disk and is configured to accommodate whispering gallery modes at multiple frequencies.

14. The method of claim 13 , wherein the electro-optical material comprises Lithium Niobate.

15. The method of claim 12 , further comprising receiving the entangled pair via a fiber optic line for further quantum processing of the entangled pair.

Assignees

• Raytheon Bbn Technologies Corp

Inventors

• Paik Hanhee

Classifications

• G06N10/70

  Quantum error correction, detection or prevention, e.g. surface codes or magic state distillation · 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

• H04B10/70 Primary

  Photonic quantum communication · CPC title

• H04B10/2575

  Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier · CPC title

• B82Y10/00

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