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Instituto de Ciencia de Materiales de Madrid |
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| Condensed Matter Theory | |||||
| Sigmund Kohler | home | cv | research | publications | ||||
On the conundrum of deriving exact solutions from approximate master equationsRoland Doll, David Zueco, Martijn Wubs, Sigmund Kohler, and Peter HänggiChem. Phys. 347, 243 (2008) We derive the exact time-evolution for a general quantum system under the influence of a bosonic bath that causes pure phase-noise and demonstrate that for a Gaussian initial state of the bath, the exact result can be obtained also within a perturbative time-local master equation approach already in second order of the system-bath coupling strength. We reveal that this equivalence holds if the initial state of the bath can be mapped to a Gaussian phase-space distribution function. Moreover, we discuss the relation to the standard Bloch-Redfield approach. arXiv:0707.3938 [quant-ph] |
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[Condensed Matter Theory]
last modified: 18.11.2024 by
Sigmund Kohler