Stability of nonequilibrium polariton superflow in the presence of a cylindrical defect
Faculty of Sciences. Physics
Physical review : B : condensed matter and materials physics. - Lancaster, Pa, 1998 - 2015
, p. 224515,1-224515,5
University of Antwerp
We make a theoretical study of the stability of nonequilibrium polariton superflows that interact with a cylindrical defect. The nonresonantly pumped polariton condensate is modeled with a generalized complex Ginzburg-Landau equation. At low pump intensities the dissipation is found to 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 speeds meet and stable superflows are no longer possible.