Effective Formalism for Open Quantum System Dynamics: Time-coarse-graining Approach
Quantum Physics
2018-01-17 v1
Abstract
We formulate an effective-description framework for the dynamics of open quantum systems by extending the time-coarse-graining formalism to open systems. Our coarse-graining procedure efficiently removes high-frequency processes which are responsible for coherences between lower- and upper-manifold states and are irrelevant when considering only low-energy dynamics. We investigate the regime of validity of the resulting coarse-grained master equation by applying it to multi-level atoms driven by far-detuned lasers. Except for such high-frequency coherences, we find good agreement between the exact and coarse-grained dynamics unless the driving lasers are too strong or the initial high-frequency coherences are sizable.
Cite
@article{arxiv.1709.00591,
title = {Effective Formalism for Open Quantum System Dynamics: Time-coarse-graining Approach},
author = {Chang-Woo Lee and Changsuk Noh and Jaewan Kim},
journal= {arXiv preprint arXiv:1709.00591},
year = {2018}
}