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Quantum-Classical Transition in Dissipative Double-Well Systems --A
Numerical Study by a New Monte Carlo Scheme--
release_rev_7bf2007c-06b2-4ab2-8d52-ca3c3c65bb2b
by
Takeshi Matsuo, Yuhei Natsume, Takeo Kato
Released
as a article
.
2006
Abstract
Thermodynamics of dissipative quantum systems with double-well potentials is
studied by the path-integral Monte Carlo (PIMC) method without truncation to
the two-state model. For efficient simulation at low temperatures, we develop a
new scheme of local update based on approximate decomposition of the Boltzmann
weight to the Gaussian distributions. Localization transition induced by ohmic
dissipation is clarified numerically for arbitrary potential barriers.
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arXiv
cond-mat/0608105v3
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