Speaker
Description
Driven-dissipative quantum fluids can differ substantially from their equilibrium counterparts. The long-wavelength phase dynamics of a polariton/photon condensate has been shown to obey Kardar-Parisi-Zhang (KPZ) equation. Since the phase is a compact variable, vortices in 2D and phase slips in 1D can proliferate destroying the KPZ scaling. The interplay between KPZ physics and topological defects is currently subject of great interest, especially in polariton context [1,2,3]. Here, we consider multicomponent system relevant to polariton condensate with different polarisations. The effective theory for Z2 degenerate coupled condensates with U(1)xU(1) symmetries maps onto coupled multicomponent KPZ equations. We perform dynamical renormalisation group analysis as well as exact numerical simulations to place polariton condensates in the subspace of a generally rich flow diagram.
References
[1] A. Ferrier, A. Zamora, G. Dagvadorj, and M.H. Szymańska Phys. Rev. B 105, 205301 (2022);
[2] A. Zamora, N. Lad, and M. H. Szymanska Phys. Rev. Lett. 125, 265701 (2020);
[3] A. Zamora, L. M. Sieberer, K. Dunnett, S. Diehl, and M. H. Szymańska Phys. Rev. X 7, 041006 (2017);
[4] H. Weinberger, P. Comaron and M. Szymanska “Multicomponent KPZ in Degenerate Coupled Condensate” in preparation.
