We generalize the recently developed diagrammatic Monte Carlo techniques for quantum impurity models from an imaginary time to a Keldysh formalism suitable for real-time and nonequilibrium calculations. Both weak-coupling and strong-coupling based methods are introduced, analysed and applied to the study of transport and relaxation dynamics in interacting quantum dots.
@article{arxiv.0810.2345,
title = {Diagrammatic Monte Carlo simulation of non-equilibrium systems},
author = {Philipp Werner and Takashi Oka and Andrew J. Millis},
journal= {arXiv preprint arXiv:0810.2345},
year = {2009}
}