Are non-equilibrium Bose-Einstein condensates superfluid?

Details Are non-equilibrium Bose-Einstein condensates superfluid? Are non-equilibrium Bose-Einstein condensates superfluid?

2010-01-05

arxiv.org/abs/1001.0660v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 5 figures

Scientific paper

We theoretically study the superfluidity properties of a non-equilibrium Bose-Einstein condensate of exciton-polaritons in a semiconductor microcavity. The dynamics of the condensate is described at mean-field level in terms of a modified Complex Ginzburg Landau equation. A generalized Landau criterion is formulated which estimates the onset of the drag force on a small moving defect. Metastability of supercurrents in multiply connected geometries persists up to higher flow speeds.

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