Wave pattern generated by an obstacle moving in a one-dimensional polariton condensate

11 febbraio 2013
ore 14.30

• Pierre-Élie Larré - LPTMS, Univ. Paris-Sud 11, France

Abstract:

Motivated by recent experiments on generation of wave patterns in polariton condensates, we analyze superfluid and dissipative characteristics of the one-dimensional flow of a nonresonantly pumped polariton-condensate past a localized obstacle. We consider the response of the condensate flow in the weak-perturbation limit, but also by means of the Whitham averaging theory in the nonlinear regime. One of the results of this work is the identification of a new time-dependent regime separating two types of stationary flow (a mostly viscous one and another one dominated by Cherenkov radiation).
I will also present results obtained by including polarization effects in the description of the polariton condensate, and I will argue that similar effects in presence of an acoustic horizon offer possibilities for demonstrating Hawking-like radiation in polariton condensates.