Critical velocity in resonantly driven polariton superfluids

PHYSICA D-NONLINEAR PHENOMENA

卷:415

Article

Pigeon, Simon¹  Aftalion, Amandine² 

[1] Sorbonne Univ, ENS PSL Res Univ, Coll France, CNRS,Lab Kastler Brossel, 4 Pl Jussieu, F-75252 Paris, France

[2] Ecole Hautes Etud Sci Sociales, Ctr Anal & Math Sociales, UMR 8557, 54 Blvd Raspail, Paris, France

关键词: Vortex nucleation;    Superfluidity;    Exciton-polariton;   

DOI  :  10.1016/j.physd.2020.132747

来源: Elsevier

【 摘 要 】

We study the necessary condition under which a resonantly driven exciton-polariton superfluid flowing against an obstacle can generate turbulence. The value of the critical velocity is well estimated by the transition from elliptic to hyperbolic of an operator following ideas developed by Frisch et al. (1992) for a superfluid flow around an obstacle, though the nature of equations governing the polariton superfluid is quite different. We find analytical estimates depending on the pump amplitude and on the pump energy detuning, quite consistent with our numerical computations. (c) 2020 Elsevier B.V. All rights reserved.

【 授权许可】

Free