Geodesic
``Superradiant'' phase transition in the presence of optical collisions
Nanosistemy: fizika, himiâ, matematika, Tome 3 (2012) no. 2, pp. 73-84.

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A problem of high-temperature phase transitions for coupled (dressed) atom-light states and polaritons is considered. An achievement of thermodynamically equilibrium phase for such a states is possible under interaction between rubidium atoms and quantum irradiation in the presence of optical collisions (OCs) with ultra-high pressure buffer gas particles being under high temperatures (up to 530 K). Special metallic micro-waveguides permitting photon trapping are proposed for purpose of the enhancement of atom-field interaction. A photonic phase transition to the superradiant state, determined by the equilibrium state of coupled system, was theoretically predicted. It have been shown that under large negative atom-light detunings and certain waveguide parameters photon-like low branch (LB) polaritons undergo high-temperature phase transition to condensate (superfluid) state.
Keywords: optical collisions, dressed states
Mots-clés : phase transitions, polaritons. 
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     author = {I. Yu. Chestnov and A. P. Alodjants and S. M. Arakelian},
     title = {``Superradiant'' phase transition in the presence of optical collisions},
     journal = {Nanosistemy: fizika, himi\^a, matematika},
     pages = {73--84},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/NANO_2012_3_2_a6/}
}
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I. Yu. Chestnov; A. P. Alodjants; S. M. Arakelian. ``Superradiant'' phase transition in the presence of optical collisions. Nanosistemy: fizika, himiâ, matematika, Tome 3 (2012) no. 2, pp. 73-84. http://geodesic.mathdoc.fr/item/NANO_2012_3_2_a6/