Dynamical decoherence in a cavity with a large number of two-level atoms
arXiv:quant-ph/0310117 · doi:10.1088/0953-4075/37/6/011
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.
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 This submission substitutes paper quant-ph/0212148 that was withdrawn.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
References in corpus (9)
- Decoherence, einselection, and the quantum origins of the classical
- Entanglement of a Mesoscopic Field with an Atom induced by Photon Graininess in a Cavity
- A model independent approach to non dissipative decoherence
- Recoherence in the entanglement dynamics and classical orbits in the N-atom Jaynes-Cummings model
- General Theorems on Decoherence in the Thermodynamic Limit
- Spin squeezing via atom - cavity field coupling
- A modern review of the two-level approximation
- Evolution of the N ion Jaynes-Cummings model beyond the standard rotating wave approximation
- Dynamical disappearance of superposition states in the thermodynamic limit