Compact source of Einstein-Podolsky-Rosen entanglement and squeezing at very low noise frequencies

J. Laurat, T. Coudreau, G. Keller, N. Treps, and C. Fabre
Phys. Rev. A 70, 042315 – Published 25 October 2004

Abstract

We report on the experimental demonstration of strong quadrature Einstein-Podolsky-Rosen entanglement and squeezing at very low noise sideband frequencies produced by a single type-II, self-phase-locked, frequency degenerate optical parametric oscillator below threshold. The generated two-mode squeezed vacuum state is preserved for noise frequencies as low as 50kHz. Designing simple setups able to generate nonclassical states of light in the kHz regime is a key challenge for high sensitivity detection of ultraweak physical effects such as gravitational wave or small beam displacement.

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  • Received 30 March 2004

DOI:https://doi.org/10.1103/PhysRevA.70.042315

©2004 American Physical Society

Authors & Affiliations

J. Laurat1, T. Coudreau1,2,*, G. Keller1, N. Treps1, and C. Fabre1

  • 1Laboratoire Kastler Brossel, UPMC, Case 74, 4 place Jussieu, 75252 Paris Cedex 05, France
  • 2Laboratoire Matériaux et Phénomènes Quantiques, Université Denis Diderot, 2 place Jussieu, 75251 Paris Cedex 05, France

  • *Electronic address: coudreau@spectro.jussieu.fr

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Vol. 70, Iss. 4 — October 2004

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