Real-time dynamics in Quantum Impurity Systems: A Time-dependent Numerical Renormalization Group Approach
强关联电子
2007-05-23 v1 介观与纳米尺度物理
摘要
We develop a general approach to the nonequilibrium dynamics of quantum impurity systems for arbitrary coupling strength. The numerical renormalization group is used to generate a complete basis set necessary for the correct description of the time evolution. We benchmark our method with the exact analytical solution for the resonant-level model. As a first application, we investigate the equilibration of a quantum dot subject to a sudden change of the gate voltage and external magnetic field. Two distinct relaxation times are identified for the spin and charge dynamics.
引用
@article{arxiv.cond-mat/0505553,
title = {Real-time dynamics in Quantum Impurity Systems: A Time-dependent Numerical Renormalization Group Approach},
author = {Frithjof B. Anders and Avraham Schiller},
journal= {arXiv preprint arXiv:cond-mat/0505553},
year = {2007}
}
备注
5 pages, 5 figures