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• W3104830736 abstract "Effective descriptions accounting for the evolution of quantum systems that are acted on by a bath are desirable. As the number of bath degrees of freedom increases and full quantum simulations turn out computationally prohibitive, simpler models become essential to understand and gain an insight into the main physical mechanisms involved in the system dynamics. In this regard, vibrational decoherence of an I$_2$ diatomics is tackled here within the framework of Markovian quantum state diffusion. The I$_2$ dynamics are analyzed in terms of an effective decoherence rate, $Lambda$, and the specific choice of the initial state, in particular, Gaussian wave packets and two-state superpositions. It is found that, for Markovian baths, the relevant quantity regarding decoherence is the product of friction ($eta$) and temperature ($T$); there is no distinction between varying one or the other. It is also observed that decoherence becomes faster as the energy levels involved in the system state correspond to higher eigenvalues. This effect is due to a population redistribution during the dynamical process and an eventual irreversible loss of the initial coherence. These results have been compared with those available in the literature from more detailed semiclassical IVR simulations, finding a good agreement." @default.
• W3104830736 created "2020-11-23" @default.
• W3104830736 creator A5078416058 @default.
• W3104830736 date "2014-02-01" @default.
• W3104830736 modified "2023-10-14" @default.
• W3104830736 title "Effective Markovian description of decoherence in bound systems" @default.
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• W3104830736 doi "https://doi.org/10.1139/cjc-2013-0399" @default.
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