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Open Quantum Systems Decoherence
On the conundrum of deriving exact solutions from approximate master equations
arXiv
Authors: Roland Doll, David Zueco, Martijn Wubs, Sigmund Kohler, Peter Hanggi
Year
2007
Paper ID
49552
Status
Preprint
Abstract Read
~2 min
Abstract Words
82
Citations
N/A
Abstract
We derive the exact time-evolution for a general quantum system under the influence of 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.
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- We derive the exact time-evolution for a general quantum system under the influence of pure phase-noise and demonstrate that for a Gaussian initial state of the bath, the exact...
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