非互易激子-极化子环形晶格
介观与纳米尺度物理
2022-05-16 v2
摘要
最近的实验展示了从非共振激光到激子-极化子凝聚体的轨道角动量（OAM）转移，尽管早先观点认为此类激光的相位信息应在极化子凝聚过程中丢失。我们用唯象理论研究了通常的角动量无关增益与角动量保持增益之间的相互作用。我们发现，即使后者小得多，也足以促使凝聚进入给定的轨道角动量态。这进一步允许系统中对称性的破缺，并进一步表现为耦合环晶格中的非互易单向传播。尽管我们只考虑环之间的厄米互易耦合，局域非厄米性产生了有效的非互易耦合，并支持与非厄米趋肤效应相关的非厄米拓扑不变量（绕数）。
引用
@article{arxiv.2205.04798,
title = {Non-reciprocal Exciton-Polariton Ring Lattices},
author = {Huawen Xu and Kevin Dini and Xingran Xu and Rimi Banerjee and Subhaskar Mandal and Timothy C. H. Liew},
journal= {arXiv preprint arXiv:2205.04798},
year = {2022}
}
备注
This version is identical to the published version of the paper [H Xu, et al., Physical Review B, 104, 195301 (2021)], however, with inclusion of the reference [D S Borgnia, et al., Physical Review letters, 124, 056802 (2020)]. It was pointed out to us that this reference was highly relevant for justifying the relationship between the skin effect, topology, and winding numbers