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arXiv 2104.07385cond-mat.quant-gascond-mat.mes-hall
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激子-极化激元凝聚体中的一级耗散相变

First-order dissipative phase transition in an exciton-polariton condensate

Galbadrakh Dagvadorj, Michal Kulczykowski, Marzena H. Szymanska, Michal Matuszewski

摘要:

本文研究了二维激子库与极化激元耦合的驱动耗散系统的相图。我们发现存在两个临界点。第一个对应于准凝聚,第二个对应于从具有空间调制密度的非均匀状态到均匀状态的一级相变。后者与由于与非凝聚储层的排斥相互作用而导致的均匀态的调制不稳定性有关。一级性质的转变是由密度和相关长度的不连续性,以及相共存和亚稳性证明。此外,我们表明,一个签名的Berezinskiii-Kosterlitz-Thouless样的过渡可以观察到的非均匀相。

英文摘要:

We investigate the phase diagram of a two-dimensional driven-dissipative system of polaritons coupled to the excitonic reservoir. We find that two critical points exists. The first corresponds to the quasi-condensation and the second to a first-order phase transition from the non-uniform state with spatially modulated density to a uniform state. The latter is related to the modulational instability of a homogeneous state due to the repulsive interactions with the non-condensed reservoir. The first-order character of the transition is evidenced by a discontinuity in the density and the correlation length as well as the phase coexistence and metastability. Moreover, we show that a signature of a Berezinskii-Kosterlitz-Thouless-like transition can be observed in the non-uniform phase.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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