Continuous variable entanglement using cold atoms

We present an experimental demonstration of both quadrature and polarization entanglement generated via the interaction between a coherent linearly polarized field and cold atoms in a high finesse optical cavity. The nonlinear atom-field interaction produces two squeezed modes with orthogonal polari...

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Bibliographic Details
Published in:Physical review letters 2004-03, Vol.92 (12), p.123601-123601, Article 123601
Main Authors: Josse, V, Dantan, A, Bramati, A, Pinard, M, Giacobino, E
Format: Article
Language:English
Subjects:
Physics
Quantum Physics
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Summary:We present an experimental demonstration of both quadrature and polarization entanglement generated via the interaction between a coherent linearly polarized field and cold atoms in a high finesse optical cavity. The nonlinear atom-field interaction produces two squeezed modes with orthogonal polarizations which are used to generate a pair of nonseparable beams, the entanglement of which is demonstrated by checking the inseparability criterion for continuous variables recently derived by Duan et al. [Phys. Rev. Lett. 84, 2722 (2000)]] and calculating the entanglement of formation [Phys. Rev. Lett. 91, 107901 (2003)]].
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.92.123601