document: Entangling atoms in bad cavities 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/sup 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/sup 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
doc_bio_tags: O O O B I O O O O O O B I I I O O O O O O O O B I O O O O O O O O O O B O O O O B I O B O O O O O O O O O O O O B I O O O O O O O O B O O O O O O O O O O O O O O O O B O O O O O B I I O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B I O O O O O O O O O O
extractive_keyphrases: entangled spin squeezed states optical cavity coupling pairwise exchange excitations cavity qed cavity decay rate bad cavities
abstractive_keyphrases: atom entanglement bichromatic light illumination strong coupling regime atom cavity coupling strength