NUMERICAL EVALUATION OF EVOLUTION OF DENSITY-MATRIX AND DECOHERENCE DUE TO NONLINEAR DYNAMICS

Authors
SAKAGAMI M KUBOTANI H OKAMURA T
Citation
M. Sakagami et al., NUMERICAL EVALUATION OF EVOLUTION OF DENSITY-MATRIX AND DECOHERENCE DUE TO NONLINEAR DYNAMICS, Progress of theoretical physics, 95(4), 1996, pp. 703-716
Citations number
20
Categorie Soggetti
Physics
Journal title
Progress of theoretical physics → ACNP
ISSN journal
0033068X
Volume
95
Issue
4
Year of publication
1996
Pages
703 - 716
Database
ISI
SICI code
0033-068X(1996)95:4<703:NEOEOD>2.0.ZU;2-S
Abstract
We discuss how the non-linearity of systems affects the nature of thei r coherence. We use a model of two coupled kicked rotors and investiga te the evolution of the reduced density matrix rho(red) obtained by tr acing out one of them. We observe that rho(red) decoheres even through the coarse-graining of one degree of freedom when the system has a st rong non-linearity.