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Phys. Rev. A 80, 042111 (2009) [6 pages]

Redundancy of classical and quantum correlations during decoherence

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Juan Pablo Paz and Augusto J. Roncaglia
Departamento de Física Juan José Giambiagi, FCEyN, UBA, Pabellón 1, Ciudad Universitaria, 1428 Buenos Aires, Argentina

Received 31 March 2009; published 22 October 2009

We analyze the time dependence of entanglement and total correlations between a system and fractions of its environment in the course of decoherence. For the quantum Brownian motion model, we show that the entanglement and total correlations have rather different dependence on the size of the environmental fraction. Redundancy manifests differently in both types of correlations and can be related with induced classicality. To study this, we present a measure of redundancy and compare it to the existing one.

© 2009 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.80.042111
DOI:
10.1103/PhysRevA.80.042111
PACS:
03.65.Yz, 03.67.Mn, 03.65.Ta