Javier Prior, Inés de Vega, Alex W. Chin, Susana F. Huelga, Martin B. Plenio
Employing a recently developed numerically exact method for the description of arbitrary system-environment interactions, we analyze the full dynamics of an atomic system coupled to an environment with a gapped spectral density. This is a situation encountered for example for the radiation field in a photonic crystal and whose analysis has been so far been confined to limiting cases due to the lack of suitable numerical techniques. We show that both atomic population and coherences' dynamics can drastically deviate from the results predicted when using the rotating wave approximation, particularly in the strong coupling regime. Experimental conditions required to observe these corrections are also discussed.
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http://arxiv.org/abs/1205.2897
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