Effect of superradiance on transport of diffusing photons in cold atomic gases

Details Effect of superradiance on transport of diffusing photons in cold atomic gases Effect of superradiance on transport of diffusing photons in cold atomic gases

2006-03-27

arxiv.org/abs/cond-mat/0603712v1

Phys. Rev. Lett. 96, 093601 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages and 1 figure

Scientific paper

10.1103/PhysRevLett.96.093601

We show that in atomic gases cooperative effects like superradiance and subradiance lead to a potential between two atoms that decays like $1/r$. In the case of superradiance, this potential is attractive for close enough atoms and can be interpreted as a coherent mesoscopic effect. The contribution of superradiant pairs to multiple scattering properties of a dilute gas, such as photon elastic mean free path and group velocity, is significantly different from that of independent atoms. We discuss the conditions under which these effects may be observed and compare our results to recent experiments on photon transport in cold atomic gases.

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