Effect of initial correlations on short-time decoherence

Details Effect of initial correlations on short-time decoherence Effect of initial correlations on short-time decoherence

2002-08-27

arxiv.org/abs/cond-mat/0208503v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 1 figure

Scientific paper

10.1103/PhysRevA.67.022109

We study the effect of initial correlations on the short-time decoherence of a particle linearly coupled to a bath of harmonic oscillators. We analytically evaluate the attenuation coefficient of a Schroedinger cat state both for a free and a harmonically bound particle, with and without initial thermal correlations between the particle and the bath. While short-time decoherence appears to be independent of the system in the absence of initial correlations, we find on the contrary that, for initial thermal correlations, decoherence becomes system dependent even for times much shorter than the characteristic time of the system. The temperature behavior of this system dependence is discussed.

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