Full and fractional defects across the Berezinskii-Kosterlitz-Thouless transition in a driven-dissipative spinor quantum fluid
Full and fractional defects across the Berezinskii-Kosterlitz-Thouless transition in a driven-dissipative spinor quantum fluid
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DOI：
10.1103/physrevresearch.5.043286
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发表时间：
2023-12
影响因子：
4.2
通讯作者：
G. Dagvadorj;P. Comaron;M. H. Szymańska
中科院分区：
文献类型：
--
作者：
G. Dagvadorj;P. Comaron;M. H. Szymańska
研究了线偏振连续泵浦驱动的二维旋量微腔极化激元系统的性质。特别是，我们建立的基本激发的作用，即所谓的半涡和全涡;这些对象进行量子旋转只有在两个或两个，自旋分量分别。我们的数值分析的稳态表明，它是唯一的半涡是目前在涡-反涡配对/解离负责Berezinskiii-Kosterlitz-无尾过渡。这些是接近临界点的相关基元激发。然而，通过探索的相位排序动力学突然淬火后的过渡，我们证明了全涡成为相关的激发远离临界点在一个深准有序状态在晚些时候。半涡结合成全涡的时间尺度比涡-反涡湮灭快得多。
We investigate the properties of a two-dimensional \emph{spinor} microcavity polariton system driven by a linearly polarised continuous pump. In particular, we establish the role of the elementary excitations, namely the so-called half-vortices and full-vortices; these objects carry a quantum rotation only in one of the two, or both, spin components respectively. Our numerical analysis of the steady-state shows that it is only the half-vortices that are present in the vortex-antivortex pairing/dissociation responsible for the Berezinskii-Kosterlitz-Thouless transition. These are the relevant elementary excitations close to the critical point. However, by exploring the phase-ordering dynamics following a sudden quench across the transition we prove that full-vortices become the relevant excitations away from the critical point in a deep quasi-ordered state at late times. The time-scales for half-vortices binding into full vortices are much faster than the vortex-antivortex annihilations.