Exploring quantum dynamics in an open many-body system: Transition to superradiance

Details Exploring quantum dynamics in an open many-body system: Transition to superradiance Exploring quantum dynamics in an open many-body system: Transition to superradiance

2003-03-12

arxiv.org/abs/quant-ph/0303078v1

Physics

Quantum Physics

15 pages, 7 figures

Scientific paper

10.1088/1464-4266/5/3/385

We study the dynamics of a complex open quantum many-body system. The coupling to external degrees of freedom can be viewed as a coupling to a radiation field, to continuum states or to a measuring apparatus. This perturbation is treated in terms of an effective non-Hermitian Hamiltonian. The influence of such coupling on the properties of the many-body dynamics is discussed, with emphasis on new effects related to dynamical segregation of fast and slow decays and the phase transition to Dicke superradiance. Relations to quantum optics, continuum shell model, theory of measurement, quantum chaos, percolation theory, and to quantum reactions are stressed.

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