分子结振动耦合电子输运弱耦合极限的展宽效应及与量子点电路QED系统的类比
Effect of broadening in the weak coupling limit of vibrationally coupled electron transport through molecular junctions and the analogy to quantum dot circuit QED systems
摘要：
本文用速率方程方法研究了稳态偏置分子结中振动模的非平衡布居。我们专注于弱电子振动耦合的限制，并表明，在共振传输制度和足够高的偏置电压，振动激发的水平随着耦合强度的降低而增加，假设一个有限的非零值。只有当明确考虑环境自由度的影响时，才能观察到关于电子振动耦合强度的分析行为。我们认为三种不同类型的加宽的影响：杂交与电极，热波动和耦合到一个热的热浴。我们的结果适用于振动耦合电子输运通过分子结，但也耦合到微波腔，其中的光子数可以预期表现出类似的行为的量子点。
英文摘要：
We investigate the nonequilibrium population of a vibrational mode in the steady state of a biased molecular junction, using a rate equation approach. We focus on the limit of weak electronic-vibrational coupling and show that, in the resonant transport regime and for sufficiently high bias voltages, the level of vibrational excitation increases with decreasing coupling strength, assuming a finite and non-zero value. An analytic behavior with respect to the electronic-vibrational coupling strength is only observed if the influence of environmental degrees of freedom is explicitly taken into account. We consider the influence of three different types of broadening: hybridization with the electrodes, thermal fluctuations and the coupling to a thermal heat bath. Our results apply to vibrationally coupled electron transport through molecular junctions but also to quantum dots coupled to a microwave cavity, where the photon number can be expected to exhibit a similar behavior.
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。
