Spatiotemporal scaling of two-dimensional nonequilibrium exciton-polariton systems with weak interactions
Spatiotemporal scaling of two-dimensional nonequilibrium exciton-polariton systems with weak interactions
复制标题
弱相互作用二维非平衡激子-极化子系统的时空尺度
DOI：
10.1103/physrevb.103.045302
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
M. Wouters
中科院分区：
文献类型：
--
作者：
Quanyu Mei;K. Ji;M. Wouters
基于随机广义Gross-Pitaevskii方程，对非相干泵浦驱动的二维非平衡激子-极化子系统进行了数值研究。我们计算了密度涨落、相干函数和标度函数。结果表明，短程关联符合Bogoliubov线性理论。当距离较远时，静态关联和动态关联都表现为KPZ普适类的非线性标度行为，特别是当相互作用较弱时。在这种制度下，比例分析对于捕捉普遍的KPZ比例特征至关重要。此外，在强KPZ区，涡间的相互作用被修正，导致复杂的非平衡涡型。
We perform a numerical study on the two-dimensional nonequilibrium exciton-polariton systems driven by incoherent pumping based on the stochastic generalized Gross-Pitaevskii equation. We calculate the density fluctuation, coherence function, and scaling function. It is found that the correlations at short range agree with the Bogoliubov linear theory. While at large distance, both static and dynamic correlations are characterized by the nonlinear scaling behaviors of Kardar-Parisi-Zhang (KPZ) universality class, especially when the interaction is weak. In this regime, scaling analyses are crucial to capture the universal KPZ scaling features. In addition, the interaction between vortices is modified in the strong KPZ regime and leads to complex nonequilibrium vortex patterns.