The stability of nonequilibrium polariton superflow in the presence of a cylindrical defect

Details The stability of nonequilibrium polariton superflow in the presence of a cylindrical defect The stability of nonequilibrium polariton superflow in the presence of a cylindrical defect

2011-05-18

arxiv.org/abs/1105.3597v1

Physics

Condensed Matter

Other Condensed Matter

5 pages, 5 figures

Scientific paper

We make a theoretical study of the stability of nonequilibrium polariton superflows that interact with a cylindrical defect. The nonresonantly pumped polariton condensate is modelled with a generalized complex Ginzburg-Landau equation. At low pump intensities the dissipation is found stabilize the superflow. At large pump intensities, we find an instability that sets a lower critical speed for superfluidity. For even larger pump power, the lower and upper critical speed meet and stable superflows are no longer possible.

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