Transport coefficients of a quantum system interacting with a squeezed heat bath

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Sh. A. Kalandarov,^1,2 Z. Kanokov,^1,3 G. G. Adamian,^1,2 and N. V. Antonenko^1,4
¹Joint Institute for Nuclear Research, 141980 Dubna, Russia
²Institute of Nuclear Physics, 702132 Tashkent, Uzbekistan
³National University, 700174 Tashkent, Uzbekistan
⁴Institut für Theoretische Physik der Justus-Liebig-Universität, D-35392 Giessen, Germany

Received 30 June 2005; revised 6 February 2006; published 26 July 2006

Theanalytical expressions for the time-dependent friction and diffusion coefficients arepresented for the case of coupling in coordinates between thecollective subsystem and a squeezed heat bath. The effects ofinitial phase-sensitive and -insensitive correlations of the heat bath onthe diffusion coefficients, fluctuations, and decoherence are studied. The interplaybetween friction and decoherence is discussed.

URL:	http://link.aps.org/doi/10.1103/PhysRevE.74.011118
DOI:	10.1103/PhysRevE.74.011118
PACS:	05.30.-d; 05.40.-a; 03.65.-w; 24.60.-k 05.30.-d Quantum statistical mechanics 05.40.-a Fluctuation phenomena, random processes, noise, and Brownian motion 03.65.-w Quantum mechanics 24.60.-k Statistical theory and fluctuations in nuclei YEAR: 2006
KEYWORDS:	quantum statistical mechanics, Markov processes, fluctuations, diffusion

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