Dissipative Dicke model with non-linear atom-photon interaction

Abstract

We study a generalized Dicke model, as recently realized in an atomic quantum gas experiment, describing the collective interaction of N two-level atoms with a single cavity mode. The model takes account of dissipation of the cavity field, and includes a non-linear atom-photon coupling, not present in the conventional Dicke model. We extend previous theoretical investigations of a semiclassical model by including all quantum effects and considering finite atom number N . Our results show good agreement between quantum expectation values and the semiclassical model as N is increased, but also show exotic behaviour for the corresponding quantum state as the non-linear atom-photon coupling is varied.

25 pages, 16 figures

References in corpus (6)

• Many-Body Physics with Ultracold Gases
• Entanglement in a second order quantum phase transition
• Characterizing the entanglement of symmetric many-particle spin-1/2 systems
• Collective Dynamics of Bose--Einstein Condensates in Optical Cavities
• Cavity QED simulation of qubit-oscillator dynamics in the ultrastrong coupling regime
• Self-Organization Threshold Scaling for Thermal Atoms Coupled to a Cavity

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