论文标题
具有相关的非平衡绿色功能的时线性量子传输模拟
Time-linear quantum transport simulations with correlated nonequilibrium Green's functions
论文作者
论文摘要
我们提出了一种时间线性缩放方法，以模拟以平衡为单位的开放和相关的量子系统。该方法从多体扰动理论继承了选择性选择动力学中最相关的散射过程的可能性，从而为量子传输中相关超快现象的实时表征铺平了道路。开放的系统动力学是用嵌入相关器来描述的，可以使用Meir-Wingreen公式从中计算时间依赖性电流。我们通过简单地嫁接最近提出的封闭系统的时线性绿色功能方法来展示如何有效地实现我们的方法。电子电子和电子相互作用可以在平等的基础上进行治疗，同时保留所有基本保护定律。
We present a time-linear scaling method to simulate open and correlated quantum systems out of equilibrium. The method inherits from many-body perturbation theory the possibility to choose selectively the most relevant scattering processes in the dynamics, thereby paving the way to the real-time characterization of correlated ultrafast phenomena in quantum transport. The open system dynamics is described in terms of an embedding correlator from which the time-dependent current can be calculated using the Meir-Wingreen formula. We show how to efficiently implement our approach through a simple grafting into recently proposed time-linear Green's function methods for closed systems. Electron-electron and electron-phonon interactions can be treated on equal footing while preserving all fundametal conservation laws.
