Dynamical decoherence in a cavity with a large number of two-level atoms
Abstract
We 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.
Keywords
Cite
@article{arxiv.quant-ph/0310117,
title = {Dynamical decoherence in a cavity with a large number of two-level atoms},
author = {Marco Frasca},
journal= {arXiv preprint arXiv:quant-ph/0310117},
year = {2007}
}
Comments
9 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 This submission substitutes paper quant-ph/0212148 that was withdrawn.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