Direct generation of entangled photon pairs in nonlinear optical
waveguides
- URL: http://arxiv.org/abs/2111.12657v1
- Date: Wed, 24 Nov 2021 17:37:27 GMT
- Title: Direct generation of entangled photon pairs in nonlinear optical
waveguides
- Authors: \'Alvaro Rodr\'iguez Echarri, Joel D. Cox, and F. Javier Garc\'ia de
Abajo
- Abstract summary: Entangled photons are pivotal elements in emerging quantum information technologies.
We introduce a scheme by which entangled photon pairs are directly generated as guided mode states in optical waveguides.
Results should find application in the design of more efficient and compact quantum optics devices.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Entangled photons are pivotal elements in emerging quantum information
technologies. While several schemes are available for the production of
entangled photons, they typically require the assistance of cumbersome optical
elements to couple them to other components involved in logic operations. Here,
we introduce a scheme by which entangled photon pairs are directly generated as
guided mode states in optical waveguides. The scheme relies on the intrinsic
nonlinearity of the waveguide material, circumventing the use of bulky optical
components. Specifically, we consider an optical fiber under normal
illumination, so that photon down-conversion can take place to waveguide states
emitted with opposite momentum into a spectral region populated by only two
accessible modes. By additionally configuring the external illumination to
interfere different incident directions, we can produce maximally entangled
photon-pair states, directly generated as waveguide modes with conversion
efficiencies that are competitive with respect to existing macroscopic schemes.
These results should find application in the design of more efficient and
compact quantum optics devices.
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