We study a prototypical model of two coupled two-level systems, where the competition between coherent and dissipative coupling gives rise to a rich phenomenology. In particular, we analyze the case of asymmetric coupling, as well as the limiting case of chiral (or one-way) coupling. We investigate various quantum optical properties of the system, including its steady state populations, power spectrum, and second-order correlation functions, and outline the characteristic features which emerge in each quantity as one sweeps through the nontrivial landscape of effective complex couplings. Most importantly, we reveal instances of population trapping, unexpected spectral features and strong emission correlations.

中文翻译：

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两个量子发射器之间的不对称耦合

我们研究了两个耦合的两级系统的原型模型，其中相干耦合和耗散耦合之间的竞争引起了丰富的现象学。特别是，我们分析了非对称耦合的情况，以及手性（或单向）耦合的极限情况。我们研究了该系统的各种量子光学特性，包括其稳态种群，功率谱和二阶相关函数，并概述了通过有效复杂耦合的非平凡景观扫掠每个数量时出现的特征。最重要的是，我们揭示了人口陷阱，意外的光谱特征和强发射相关性的实例。