标题： 相干激子动力学在由非共振振动模式维持的耗散环境中 显示英文标题

标题： Coherent exciton dynamics in a dissipative environment maintained by an off-resonant vibrational mode

摘要： 开放量子系统与其环境之间的相互作用可能导致相干和非相干行为。 我们探讨了强耦合到单个玻色模如何改变结构化环境中两能级系统的相干特性。 该模被精确处理，其余环境由玻色模的马尔可夫浴组成。 为了评估两能级系统的相干动力学是否被修改，我们对不同形式的浴谱密度改变了两能级系统与单个模之间的耦合强度。 我们发现明显的站点占据振荡频率的重整化，导致与浴的相互作用发生变化。 这导致两能级系统的相干行为增强或减弱，具体取决于谱密度函数的形式。 我们提出了一种基于解析模型的直观解释来说明这种行为。 显示英文摘要

摘要： The interplay between an open quantum system and its environment can lead to both coherent and incoherent behaviour. We explore the extent to which strong coupling to a single bosonic mode can alter the coherence properties of a two-level system in a structured environment. This mode is treated exactly, with the rest of the environment comprising a Markovian bath of bosonic modes. The strength of the coupling between the two-level system and the single mode is varied for a variety of different forms for the bath spectral density in order to assess whether the coherent dynamics of the two-level system are modified. We find a clear renormalisation of the site population oscillation frequency that causes an altered interaction with the bath. This leads to enhanced or reduced coherent behaviour of the two-level system depending on the form of the spectral density function. We present an intuitive interpretation, based on an analytical model, to explain the behaviour.