论文标题
通过从弱系统之间从弱耦合方向转变而引起的能量运输
Energy Transport Induced by Transition from Weak to Strong Coupling Regime Between Non-Hermitian systems
论文作者
论文摘要
最近，由于它们具有新的特性，因此广泛研究了不同性质的非弱点物理系统之间的强耦合。在这项工作中，我们研究了强耦合系统之间的能量传输。我们使用部分代谢方法来描述开放量子系统，以调查从弱耦合方案到强耦合方案的过渡期间的系统动力学，并增加了子系统之间的耦合。在强烈耦合的两级原子的示例中，我们表明，在系统和储层之间的能量传输的过渡点附近发生。这表明，在零频率和非零频率失调的情况下，能量流归一流至耦合常数达到最大值。我们表明，如果没有明确的过渡点从弱耦合到强耦合方案，则可以将归一化能流的最大化用于确定向强耦合方案的过渡。证明了高松弛时能量流的抑制。
Recently, strong coupling between non-Hermitian physical systems of different nature is widely investigated due to it endows them with new properties. In this work, we investigate the energy transport between strongly coupled systems. We use a partial-secular approach for the description of an open quantum system to investigate the system dynamics during the transition from a weak to a strong coupling regime with an increase of coupling between subsystems. On the example of strongly coupled two-level atoms, we show that near the transition point enhancement of energy transport between the system and reservoirs takes place. This manifests in the fact that energy flow normalized to the coupling constant reaches the maximum both in the cases of zero and non-zero frequency detuning. We show that maximization of normalized energy flow can be used for the determination of the transition to the strong coupling regime in the case of non-zero detuning when there is no clear transition point from the weak to strong coupling regime. The suppression of the energy flow at high relaxation is demonstrated.
