Iterative path integral summation for nonequilibrium quantum transport
Mesoscale and Nanoscale Physics
2015-06-15 v1 Strongly Correlated Electrons
Abstract
We have developed a numerically exact approach to compute real-time path integral expressions for quantum transport problems out of equilibrium. The scheme is based on a deterministic iterative summation of the path integral (ISPI) for the generating function of nonequilibrium observables of interest, e.g., the charge current or dynamical quantities of the central part. Self-energies due to the leads, being nonlocal in time, are fully taken into account within a finite memory time, thereby including non-Markovian effects. Numerical results are extra-polated first to vanishing (Trotter) time discretization and, second, to infinite memory time...
Cite
@article{arxiv.1304.6919,
title = {Iterative path integral summation for nonequilibrium quantum transport},
author = {S. Weiss and R. Hützen and D. Becker and J. Eckel and R. Egger and M. Thorwart},
journal= {arXiv preprint arXiv:1304.6919},
year = {2015}
}
Comments
submitted to Special issue in physica status solidi (b) Quantum transport at the molecular scale