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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 16 — Aug. 3, 2009
  • pp: 14444–14457

Generation of two-mode squeezed and entangled light in a single temporal and spatial mode

W. Wasilewski, T. Fernholz, K. Jensen, L. S. Madsen, H. Krauter, C. Muschik, and E. S. Polzik  »View Author Affiliations


Optics Express, Vol. 17, Issue 16, pp. 14444-14457 (2009)
http://dx.doi.org/10.1364/OE.17.014444


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Abstract

We analyse a novel squeezing and entangling mechanism which is due to correlated Stokes and anti-Stokes photon forward scattering in a multi-level atom vapour. We develop a full quantum model for an alkali atomic vapour including quantized collective atomic states which predicts high degree of squeezing for attainable experimental conditions. Following the proposal we present an experimental demonstration of 3.5 dB pulsed frequency nondegenerate squeezed (quadrature entangled) state of light using room temperature caesium vapour. The source is very robust and requires only a few milliwatts of laser power. The squeezed state is generated in the same spatial mode as the local oscillator and in a single temporal mode. The two entangled modes are separated by twice the Zeeman frequency of the vapour which can be widely tuned. The narrow-band squeezed light generated near an atomic resonance can be directly used for atom-based quantum information protocols. Its single temporal mode characteristics make it a promising resource for quantum information processing.

© 2009 Optical Society of America

OCIS Codes
(190.5650) Nonlinear optics : Raman effect
(270.6570) Quantum optics : Squeezed states
(270.5585) Quantum optics : Quantum information and processing

ToC Category:
Quantum Optics

History
Original Manuscript: July 1, 2009
Revised Manuscript: July 28, 2009
Manuscript Accepted: July 30, 2009
Published: July 31, 2009

Citation
W. Wasilewski, T. Fernholz, K. Jensen, L. S. Madsen, H. Krauter, C. Muschik, and E. S. Polzik, "Generation of two-mode squeezed and entangled light in a single temporal and spatial mode," Opt. Express 17, 14444-14457 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-16-14444


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