We study a cascaded system of two subsystems repeatedly interacting with a bath prepared in various non-thermal states. Effects of different types of bath coherence on dynamics of the system heat flux are explored. For a single-qubit bath with the displacement coherence, heat flux of each subsystem is divided into dissipative and coherent parts. In the stationary regime, the dissipative heat fluxes are the same for the two subsystems, but the coherent parts are not due to the cascaded feature. In the transient regime, heat fluxes occur even when the system and the bath have the same temperature and, more surprisingly, heat flow reversal appears when temperatures of the system and the bath differ. For a two-qubit bath we consider two types of coherence: the squeezing and the heat-exchange ones. In the stationary regime, the squeezing coherence establishes correlations between the subsystems, each of which is evolving to its thermal state with a temperature identical to the bath’s...

中文翻译：

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由于非热浴的相干性，两量子位级联系统中的热通量

我们研究了两个子系统的级联系统，这些子系统与在各种非热态下准备的镀液反复相互作用。探索了不同类型的熔池相干性对系统热通量动力学的影响。对于具有位移相干的单量子浴，每个子系统的热通量分为耗散部分和相干部分。在平稳状态下，两个子系统的耗散热通量相同，但相干部分不是由于级联特征引起的。在瞬态状态下，即使系统和熔池具有相同的温度，也会发生热通量，更令人惊讶的是，当系统和熔池的温度不同时，热流会逆转。对于两比特的浴，我们考虑了两种类型的相干性：挤压和热交换。在平稳状态下