Unconventional Berezinskii-Kosterlitz-Thouless Transition in the Multicomponent Polariton System.
Unconventional Berezinskii-Kosterlitz-Thouless Transition in the Multicomponent Polariton System.
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多分量极化子系统中的非常规 Berezinskii-Kosterlitz-Thouless 转变。
DOI：
10.1103/physrevlett.130.136001
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发表时间：
2023
影响因子：
8.6
通讯作者：
Dagvadorj G
中科院分区：
文献类型：
--
作者：
Dagvadorj G
我们研究了一个由激子、光子、信号和空闲模式组成的四组分偏振子系统，该系统跨越Berezinskii-Kosterlitz-Thouless （BKT）跃迁。我们证明了所有四个分量都具有相同的BKT临界点，并且空间相干的代数衰减具有相同的临界指数。然而，尽管不同组分中的集体激励在接近和远离临界时都是强锁定的，但在相变附近自发产生的拓扑缺陷在很大程度上与组分间模式锁定无关，而是强烈依赖于给定模式内的密度。这种特殊的特性使我们能够揭示一种新的物质状态，其特征是拓扑缺陷的构型在具有相干性代数衰减的超流体上扩散，目前的实验已经证明可以观察到这种状态。
We study a four-component polariton system in the optical parametric oscillator regime consisting of exciton, photon, signal, and idler modes across the Berezinskii-Kosterlitz-Thouless (BKT) transition. We show that all four components share the same BKT critical point, and algebraic decay of spatial coherence with the same critical exponent. However, while the collective excitations in different components are strongly locked, both close to and far from criticality, the spontaneous creation of topological defects in the vicinity of the phase transition is found to be largely independent of the intercomponent mode locking, and instead strongly dependent on the density within a given mode. This peculiar characteristic allows us to reveal a novel state of matter, characterized by configurations of topological defects proliferating on top of a superfluid with algebraic decay of coherence, observation of which is demonstrated to be within reach of current experiments.
影响因子：
64.8
作者：
Kasprzak, J.;Richard, M.;Dang, Le Si
通讯作者：
Dang, Le Si
影响因子：
64.8
作者：
Fontaine, Quentin;Squizzato, Davide;Bloch, Jacqueline
通讯作者：
Bloch, Jacqueline