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Continuous variable entanglement using cold atoms

Abstract : We present experimental demonstration of quadrature andpolarization entanglement generated via the interactionbetween a coherent linearly polarized field and cold atoms in ahigh finesse optical cavity. The non linear atom-field interactionproduces two squeezed modes with orthogonal polarizations whichare used to generate a pair of non separable beams, theentanglement of which is demonstrated by checking the inseparabilitycriterion for continuous variables recently derived by Duanet al. [Phys. Rev. Lett. 84, 2722 (2000)] and calculating the entanglement of formation [Giedke et al., Phys. Rev. Lett. 91, 107901 (2003)].
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Submitted on : Monday, December 1, 2003 - 4:21:54 PM
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Vincent Josse, Aurelien Dantan, Alberto Bramati, Michel Pinard, Elisabeth Giacobino. Continuous variable entanglement using cold atoms. Physical Review Letters, American Physical Society, 2004, 92, pp.123601. ⟨hal-00000437v3⟩



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