Change of decoherence scenario and appearance of localization due to reservoir anharmonicity

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  • 6 April 2005
Abstract
Although super-ohmic coupling to a bosonic reservoir leads only to partial dephasing on short time scales, exponential decay of coherence appears in the Markovian limit (for long times) if anharmonicity of the reservoir is taken into account. This effect not only qualitatively changes the decoherence scenario but also leads to localization processes that depend on the spatial separation between the localized pointer basis states.

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