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arXiv:cond-mat/9609054 · Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics

Cumulant expansions and the spin-boson problem

David R. Reichman, Frank L. H. Brown, Peter Neu

Published Mar 1, 1997• 33 citations
arXivHTMLPDF

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 the noncrossing cumulant expansion technique appears to embody the virtues of the more standard cumulant methods.
DOI
10.1103/physreve.55.2328

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