Abstract
Abstract We consider two identical atoms, taken in the harmonic approximation, inside a spherical cavity filled with a field described by an infinite set of oscillators. The atoms are linearly coupled to the field. Using the dressed-state approach and considering the field modes populated with thermal-distribution, we study the effect of temperature on the time evolution of entangled states of the pair of atoms. We particularly analyze the cases of finite and very-large cavities showing that survival and sudden-death of entanglement can happen at finite temperature.
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