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Abstracts
We consider a two-level system, which couples via non-commuting operators to two independent oscillator baths. When the coupling is symmetric, the renormalized hopping matrix element is finite even for infinitely strong coupling strength. The two-level system is in a delocalized phase. For finite coupling strength a localization transition occurs for a critical asymmetry angle, which separates the localized from the delocalized phase. Using the method of flow equations we are able to monitor real time dynamics.
Discipline
- 03.65.Yz: Decoherence; open systems; quantum statistical methods(see also 03.67.Pp in quantum information; for decoherence in Bose-Einstein condensates, see 03.75.Gg)
- 05.30.-d: Quantum statistical mechanics(for quantum fluids aspects, see 67.10.Fj)
- 73.23.-b: Electronic transport in mesoscopic systems
- 05.45.Mt: Quantum chaos; semiclassical methods
Journal
Year
Volume
Issue
Pages
1053-1059
Physical description
Dates
published
2013-12
Contributors
author
- Instituto de Ciencia de Materiales de Madrid, CSIC, Sor Juana de la Cruz 3, Cantoblanco, 28049 Madrid, Spain
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv124n652kz