Dynamical decoherence in a cavity with a large number of two-level atoms

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dc.creatorFrasca, Marco
dc.date2003-10-19
dc.date2004-02-09
dc.date.accessioned2026-07-07T06:08:07Z
dc.date.available2026-07-07T06:08:07Z
dc.descriptionWe consider a large number of two-level atoms interacting with the mode of a cavity in the rotating-wave approximation (Tavis-Cummings model). We apply the Holstein-Primakoff transformation to study the model in the limit of the number of two-level atoms, all in their ground state, becoming very large. The unitary evolution that we obtain in this approximation is applied to a macroscopic superposition state showing that, when the coherent states forming the superposition are enough distant, then the state collapses on a single coherent state describing a classical radiation mode. This appear as a true dynamical effect that could be observed in experiments with cavities.
dc.description9 pages, no figures. This submission substitutes paper quant-ph/0212148 that was withdrawn. Version accepted for publication in Journal of Physics B: Atomic, Molecular & Optical Physics
dc.identifierhttps://arxiv.org/abs/quant-ph/0310117
dc.identifierhttp://arxiv.org/abs/quant-ph/0310117
dc.identifierJ. Phys. B: At. Mol. Opt. Phys. 37 (2004) 1273-1278
dc.identifierdoi:10.1088/0953-4075/37/6/011
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/91521
dc.subjectQuantum Physics
dc.subjectOther Condensed Matter
dc.subjectAtomic Physics
dc.titleDynamical decoherence in a cavity with a large number of two-level atoms
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