Superfluidity of a nonequilibrium Bose-Einstein condensate of polaritons

• Published in: Physical Review B, vol. 81, p. 054508
• Publication date: 2010

We study theoretically superfluidity in a driven-dissipative Bose gas out of thermal equilibrium, and discuss the relation with conventional superfluids. We show how the superfluid behavior is characterized by a dramatic increase in the lifetime of a quantized vortex and point out the influence of the spatial geometry of the condensate. We apply our study to a condensate of polaritons in a semiconductor microcavity, whose properties can be directly inferred from optical spectroscopy. We propose three different experimental schemes to measure the vorticity of the polariton condensate.

Keywords: Superfluidity ; Bose-Einstein Condensation ; Polaritons ; Quantum kinetics ; Fluctuations ; Dissipation

Reference

• LTPN-ARTICLE-2010-002
• doi:10.1103/PhysRevB.81.054508
• View record in Web of Science

• URL: http://link.aps.org/doi/10.1103/PhysRevB.81.054508

Record created on 2010-02-14, modified on 2012-03-21