Cumulant Expansions and the Spin-Boson Problem
Condensed Matter
2009-10-28 v1
Abstract
The dynamics of the dissipative two-level system at zero temperature is studied using three different cumulant expansion techniques. The relative merits and drawbacks of each technique are discussed. It is found that a new technique, the non-crossing cumulant expansion, appears to embody the virtues of the more standard cumulant methods.
Cite
@article{arxiv.cond-mat/9609054,
title = {Cumulant Expansions and the Spin-Boson Problem},
author = {D. R. Reichman and F. L. H. Brown and P. Neu},
journal= {arXiv preprint arXiv:cond-mat/9609054},
year = {2009}
}
Comments
26 pages, LaTex