We consider the dissipative N two-level atom Dicke system driven by a c.w. laser field. In the steady state, the cooperativity among the atoms via the radiation field produces spin squeezing. Even in the absence of dipole-dipole interaction, the system shows spin squeezing which is attributed to strong nonlinear interaction with the driving field. (C) 2009 Elsevier B.V. All rights reserved.
机构:
Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA
Tsinghua Univ, IIIS, Ctr Quantum Informat, Beijing 100084, Peoples R ChinaUniv Michigan, Dept Phys, Ann Arbor, MI 48109 USA
Zhang, Z.
Duan, L. M.
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机构:
Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA
Tsinghua Univ, IIIS, Ctr Quantum Informat, Beijing 100084, Peoples R ChinaUniv Michigan, Dept Phys, Ann Arbor, MI 48109 USA