Phys. Rev. Lett. 92, 123601 (2004) [4 pages]Continuous Variable Entanglement using Cold AtomsReceived 10 September 2003; published 22 March 2004 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 [ Giedke et al. Phys. Rev. Lett. 91 107901 (2003)]. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.123601
DOI:
10.1103/PhysRevLett.92.123601
PACS:
42.50.Dv, 03.67.Mn, 42.50.Ct
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