Volume 102, Number 6, June 2013
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||11 July 2013|
Non-equilibrium quasi-condensates in reduced dimensions
1 Dipartimento di Fisica, Università di Trento - via Sommarive 14, 38123 Povo, Italy, EU
2 SISSA - International School for Advanced Studies - via Bonomea 265, 34136 Trieste, Italy, EU
3 INO-CNR BEC Center and Dipartimento di Fisica, Università di Trento - via Sommarive 14, 38123 Povo, Italy, EU
Received: 25 February 2013
Accepted: 8 June 2013
We develop a generic phenomenological model to describe the fluctuations on top of a non-equilibrium Bose-Einstein condensate. Analytic expressions are obtained for the momentum distribution of the non-condensed cloud and for the long-distance behavior of the spatial coherence in the different dimensionalities. Comparison of our predictions with available experimental data on condensates of exciton-polaritons and on surface-emitting planar laser devices is finally made.
PACS: 71.36.+c – Polaritons (including photon-phonon and photon-magnon interactions) / 03.75.Kk – Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow / 05.70.Ln – Nonequilibrium and irreversible thermodynamics
© EPLA, 2013
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