US 12,647,188 B2 · Systems and methods for performing quantum telecommunications using a bichromatic entanglement source

Abstract

Systems and methods for generating an entangled pair of bichromatic photons are described. The system includes an atomic vapor cell containing atoms of an atomic species located within beam paths of a first and second laser beam. The first and second laser beams are tuned to first and second wavelengths that are resonant with first and second atomic transitions of the atomic species such that the first and second laser beams cause a four-wave mixing process within the atomic vapor cell. As a result of the four-wave mixing process, entangled photon pairs having a third and fourth wavelength are generated and output from the atomic vapor cell. The first and second wavelengths may be selected to create electromagnetically-induced transparency (EIT) within the atomic vapor cell, the EIT creating a transparent medium within the atomic vapor cell at the third wavelength, improving spectral brightness and/or photon linewidths.

Claims24

Dependent claims

A device for generating an entangled pair of photons, the device comprising:

a first atomic vapor cell disposed within beam paths of a first laser beam and a second laser beam, the first atomic vapor cell comprising atoms of an atomic species configured to generate the entangled pair of photons in response to excitations caused by photons of the first laser beam and the second laser beam, wherein:
the atomic species comprises a first atomic transition and a second atomic transition,
the first laser beam has a first wavelength,
the second laser beam has a second wavelength, the second wavelength being different than the first wavelength, and
the first and second wavelengths satisfy conditions for a four-wave mixing process in the first atomic vapor cell, the four-wave mixing process causing generation of the entangled pair of photons, the entangled pair of photons comprising a first photon having a third wavelength and a second photon having a fourth wavelength, the first wavelength being approximately 795 nm and the second wavelength being approximately 1324 nm or approximately 1449 nm.

2 more elements

A method of generating an entangled pair of photons, the method comprising:

generating a first laser beam using a first laser, the first laser beam having a first wavelength;
generating a second laser beam using a second laser, the second laser beam having a second wavelength different than the first wavelength;
causing a four-wave mixing process in a first atomic vapor cell containing an atomic vapor of an atomic species by passing the first laser beam and the second laser beam through the first atomic vapor cell;
and
generating, as a result of the four-wave mixing process, the entangled pair of photons, wherein:
generating the entangled pair of photons comprising generating a first photon having a third wavelength and a second photon having a fourth wavelength, the first wavelength being approximately 795 nm and the second wavelength being approximately 1324 nm or approximately 1449 nm.

3 more elements

Dependencies are inferred from the claim text.

Systems and methods for performing quantum telecommunications using a bichromatic entanglement source

Life of this patent

Systems and methods for performing quantum telecommunications using a bichromatic entanglement source

Life of this patent

Abstract

Claims24