Quasi-one-dimensional flow of polariton condensate past an obstacle

Details Quasi-one-dimensional flow of polariton condensate past an obstacle Quasi-one-dimensional flow of polariton condensate past an obstacle

2011-12-18

arxiv.org/abs/1112.4142v1

EPL, 97, 10006 (2012)

Physics

Condensed Matter

Quantum Gases

to be published in Europhysics Letters

Scientific paper

10.1209/0295-5075/97/10006

Nonlinear wave patterns generated by the flow of polariton condensate past an obstacle are studied for quasi-one-dimensional microcavity geometry. It is shown that pumping and nonlinear damping play a crucial role in this process leading to sharp differences in subsonic and supersonic regimes. Subsonic flows result in a smooth disturbance of the equilibrium condensate around the obstacle whereas supersonic flow generates a dispersive shock wave in the flow upstream the obstacle and a long smooth downstream tail. Main characteristics of the wave pattern are calculated analytically and analytical results are in excellent agreement with the results of numerical simulations. The conditions for existence of stationary wave patterns are determined numerically.

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