标题： 二维激子-极化子玻色-爱因斯坦凝聚的相图和普遍标度区域 显示英文标题

标题： Phase diagram and universal scaling regimes of two-dimensional exciton-polariton Bose-Einstein condensates

摘要： 许多系统，经典或量子，封闭或开放，都表现出普遍的统计特性。激子-极化子凝聚体本质上是驱动-耗散的，为观察非平衡普遍特性提供了一个有前景的平台。通过进行对非相干泵浦和相互作用的凝聚体与激子库耦合的广泛数值模拟，我们表明，可以通过改变激子-极化子相互作用强度，将凝聚体相位动力学的有效非线性在较宽范围内精细调节，从而使人们能够探测三种主要的普遍区域，这些区域的参数在当前实验中是可获得的：弱非线性爱德华-威尔金森（EW）区域，在此区域内相位涨落占主导地位，但相位轮廓不会变得粗糙；强非线性卡达-帕里索-张（KPZ）区域，在此区域内凝聚体相位涨落以超扩散方式增长，导致相位粗糙化；以及在更强相互作用下出现的以涡旋为主的区域，在此区域内密度和相位动力学都起着重要作用。我们的结果为非相干泵浦下二维激子-极化子凝聚体的相图提供了统一的图像，并为最近的实验和数值观察提供了见解。 显示英文摘要

摘要： Many systems, classical or quantum, closed or open, exhibit universal statistical properties. Exciton-polariton condensates, being intrinsically driven-dissipative, offer a promising platform for observing non-equilibrium universal features. By conducting extensive numerical simulations of an incoherently pumped and interacting condensate coupled to an exciton reservoir we show that the effective nonlinearity of the condensate phase dynamics can be finely adjusted across a broad range, by varying the exciton-polariton interaction strength, allowing one to probe three main universal regimes with parameters accessible in current experiments: the weakly nonlinear Edwards-Wilkinson (EW) regime, where the phase fluctuations dominate, but the phase profile does not become rough, the strongly non-linear Kardar-Parisi-Zhang regime, where the condensate phase fluctuations grow in a superdiffusive manner leading to roughening of the phase, and a vortex-dominated phase emerging at stronger interactions, where both density and phase dynamics play significant roles. Our results provide a unified picture of the phase diagram of 2d exciton-polariton condensates under incoherent pumping, and shed light on recent experimental and numerical observations.