Temperature Dependence Of The Energy-Level Shift Induced By The Bose-Einstein Condensation Of Photons
CHINESE PHYSICS B(2012)
Abstract
We investigate the energy-level shift of a hydrogen atom in a two-dimensional optical microcavity, where there exists a Bose-Einstein condensation of photons. It is found that below the critical temperature T-c, the energy-level shift of the bound electron is dependent on temperature, and it is a monotonically increasing function of the absolute temperature T. Especially, at the absolute zero temperature, the energy-level shift entirely comes from the Lamb shift, and the atom can be treated approximately, that is, in vacuum.
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Key words
Bose-Einstein condensation,energy-level shift,two-level atom
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