Spin Squeezing and Light Entanglement in Coherent Population Trapping

Journal Article · Fri Jul 14 00:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.97.023605· OSTI ID:20860510

Dantan, A ^[1]; Cviklinski, J; Giacobino, E; Pinard, M ^[2]

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1. Laboratoire Charles Fabry de l'Institut d'Optique, F91403 Orsay cedex (France)
2. Laboratoire Kastler Brossel, UPMC, 4 place Jussieu, F75252 Paris cedex 05 (France)

We show that strong squeezing and entanglement can be generated at the output of a cavity containing atoms interacting with two fields in a coherent population trapping situation, on account of a nonlinear Faraday effect experienced by the fields close to a dark-state resonance in a cavity. Moreover, the cavity provides a feedback mechanism allowing to reduce the quantum fluctuations of the ground state spin, resulting in strong steady state spin squeezing.

• OSTI ID: 20860510
• Journal Information: Physical Review Letters, Vol. 97, Issue 2; Other Information: DOI: 10.1103/PhysRevLett.97.023605; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOMS
FARADAY EFFECT
FEEDBACK
FLUCTUATIONS
GROUND STATES
NONLINEAR PROBLEMS
QUANTUM ENTANGLEMENT
RESONANCE
SPIN
STEADY-STATE CONDITIONS
TRAPPING