Non-Equilibrium Dynamics and Charge Transport in Quantum Impurity Systems

由有限的充电能量引起的多体关联控制了量子杂质系统的实时动力学和稳态。本项目的中心重点是将散射数值重整化群方法应用于磁输运和自旋电子学，这是在前一个资助期内开发的。特别是，我们将我们的方法扩展到更复杂的纳米器件，如纳米桥。结果将被基准为小的相互作用强度与微扰和保守Keldysh的方法进行比较。我们将继续研究如何将含时NRG扩展到由外部脉冲和任意含时哈密顿驱动的强相互作用量子系统。

Many-body correlations caused by the finite charging energy dominate the real-time dynamics and the steady-state of quantum-impurity systems out of equilibrium. The central focus of this project will be the application of scattering numerical renormalization group method to magneto-transport and spintronics which was developed during the previous funding period. In particular we will extend our method to more complex nano-devices such as nano-bridges. The results will be benchmarked for small interaction strength by comparison with perturbative and conserving Keldysh approaches. We will pursue ideas to extent the time-dependent NRG to strongly interacting quantum systems driven by external pulses and arbitrary time-dependent Hamiltonians.