paper

Distance growth of quantum states due to initial system--environment correlations

arXiv:1005.0364 · doi:10.1103/PhysRevA.82.012341

Abstract

Intriguing features of the distance between two arbitrary states of an open quantum system are identified that are induced by initial system-environment correlations. As an example, we analyze a qubit dephasingly coupled to a bosonic environment. Within tailored parameter regimes, initial correlations are shown to substantially increase a distance between two qubit states evolving to long-time limit states according to exact non-Markovian dynamics. It exemplifies the breakdown of the distance contractivity of the reduced dynamics.

4 pages, 3 figures

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