Dissipative structures of quantized vortices in a coherently pumped polariton superfluid

Abstract

Steady states reached in a coherently pumped exciton-polariton superfluid are investigated. As the pump parameter is changed, the translational symmetry of the uniform system is spontaneously broken, and various steady patterns of quantized vortices are formed. This is peculiar to nonequilibrium dissipative systems with continuous pumping.

Taming the snake instabilities in a polariton superfluid

“…A scheme which emerged recently is based on resonant pumping and the use of the bistability loop of the nonlinear polariton system [20][21][22] where, for a given pumping intensity, the density can be either low or high. When high and low density regions are simultaneously present in the system, stationary phase defects of a new type can exist in low-density regions [23][24][25][26][27][28], where the phase is not fixed by the resonant excitation, because most particles are not directly injected by the laser but diffuse from higher-density regions which represent potential barriers with sharp interfaces.…”