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arXiv 2211.08484quant-phcond-mat.mes-hallcond-mat.stat-mech
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非厄米系统间由弱耦合向强耦合跃迁引起的能量输运

Energy Transport Induced by Transition from Weak to Strong Coupling Regime Between Non-Hermitian systems

I. V. Vovcenko, A. A. Zyablovsky, A. A. Pukhov, E. S. Andrianov

摘要:

近年来,不同性质的非厄米物理系统之间的强耦合由于赋予了它们新的性质而受到广泛的研究。在这项工作中,我们研究了强耦合系统之间的能量输运。我们用部分久期方法描述了一个开放量子系统,研究了随着子系统之间耦合的增加,系统从弱耦合状态向强耦合状态转变的动力学过程。在强耦合二能级原子的例子中,我们发现在跃迁点附近,系统和库之间的能量输运增强。这表明,归一化到耦合常数的能量流在零和非零频率失谐的情况下都达到最大值。我们表明,最大化的归一化能量流可以用于确定的过渡到强耦合制度的情况下,非零失谐时,没有明确的过渡点从弱到强耦合制度。在高松弛的能量流的抑制被证明。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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