Thermal Effects on the Stability of Excited Atoms in Cavities

Details Thermal Effects on the Stability of Excited Atoms in Cavities Thermal Effects on the Stability of Excited Atoms in Cavities

2009-10-15

arxiv.org/abs/0910.2930v2

Phys.Rev.A81:032119,2010

Physics

Quantum Physics

7 pages, 4 figures

Scientific paper

10.1103/PhysRevA.81.032119

An atom, coupled linearly to an environment, is considered in a harmonic approximation in thermal equilibrium inside a cavity. The environment is modeled by an infinite set of harmonic oscillators. We employ the notion of dressed states to investigate the time evolution of the atom initially in the first excited level. In a very large cavity (free space) for a long elapsed time, the atom decays and the value of its occupation number is the physically expected one at a given temperature. For a small cavity the excited atom never completely decays and the stability rate depends on temperature.

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