Flow equation renormalization of a spin-boson model with a structured bath
Mesoscale and Nanoscale Physics
2015-06-24 v1 Statistical Mechanics
Abstract
We discuss the dynamics of a spin coupled to a damped harmonic oscillator. This system can be mapped to a spin-boson model with a structured bath, i.e. the spectral function of the bath has a resonance peak. We diagonalize the model by means of infinitesimal unitary transformations (flow equations), thereby decoupling the small quantum system from its environment, and calculate spin-spin correlation functions.
Cite
@article{arxiv.cond-mat/0302357,
title = {Flow equation renormalization of a spin-boson model with a structured bath},
author = {Silvia Kleff and Stefan Kehrein and Jan von Delft},
journal= {arXiv preprint arXiv:cond-mat/0302357},
year = {2015}
}
Comments
2 pages, to be published in Physica E, proceedings of the LT 2002