Entangling atoms in bad cavities

Details Entangling atoms in bad cavities Entangling atoms in bad cavities

2002-02-13

arxiv.org/abs/quant-ph/0202073v2

Physics

Quantum Physics

8 pages, including 3 figures, submitted to PRA. Ver 2: minor changes

Scientific paper

10.1103/PhysRevA.66.022314

We propose a method to produce entangled spin squeezed states of a large number of atoms inside an optical cavity. By illuminating the atoms with bichromatic light, the coupling to the cavity induces pairwise exchange of excitations which entangles the atoms. Unlike most proposals for entangling atoms by cavity QED, our proposal does not require the strong coupling regime g^2/\kappa\Gamma>> 1, where g is the atom cavity coupling strength, \kappa is the cavity decay rate, and \Gamma is the decay rate of the atoms. In this work the important parameter is Ng^2/\kappa\Gamma, where N is the number of atoms, and our proposal permits the production of entanglement in bad cavities as long as they contain a large number of atoms.

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