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- W2922126890 abstract "We show how to recover complete positivity (and hence positivity) of the Redfield equation via a coarse-grained averaging technique. We derive general bounds for the coarse graining timescale above which the positivity of the Redfield equation is guaranteed. It turns out that a coarse grain timescale has strong impact on the characteristics of the Lamb shift term and implies, in general, noncommutation between the dissipating and the Hamiltonian components of the generator of the dynamical semigroup. Finally, we specify the analysis to a two-level system or a quantum harmonic oscillator coupled to a fermionic or bosonic thermal environment via dipolelike interaction." @default.
- W2922126890 created "2019-03-22" @default.
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- W2922126890 date "2019-07-09" @default.
- W2922126890 modified "2023-10-05" @default.
- W2922126890 title "Open-quantum-system dynamics: Recovering positivity of the Redfield equation via the partial secular approximation" @default.
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- W2922126890 doi "https://doi.org/10.1103/physreva.100.012107" @default.
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