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arXiv:cond-mat/0701005

Effective Field Theory for Light in Disordered Atomic Medium

Smirnov, M. B., M.A. Baranov

Published Dec 30, 2006• 0 citations
arXivHTMLPDF

Abstract

We develop a field theory approach to light propagation in a gas of resonant atoms taking into account vector character of light and atom-atom interactions. Within this approach, we calculate the propagator of the electric field for both short and long-range density-density correlation functions of the gas.
DOI
10.48550/arxiv.cond-mat/0701005

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With ready access to massive computer clusters we may now study light propagation in a dense cold atomic gas by means of basically exact numerical simulations. We report on a direct comparison between traditional optics, that is, electrodynamics of a polarizable medium, and numerical simulations in an elementary problem of light propagating through a slab of matter. The standard optics fails already at quite low atom densities, and the failure becomes dramatic when the average interatomic separation is reduced to around k(-1), where k is the wave number of resonant light. The difference between the two solutions originates from correlations between the atoms induced by light-mediated dipole-dipole interactions.
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