Decoherence by a quantum critical environment

Preprint

12 October 2005

preprint
Published by arXiv in arXiv

Abstract

We study the relation between the appearance of classicality in a quantum system and quantum criticality of its surrounding environment. We generalize the Hepp-Coleman approach for quantum decoherence by modelling the environment by an Ising model in a transverse field. We find that the quantum critical behavior of the environment strongly affects its capability of inducing decoherence: at the quantum phase transition decoherence of the quantum system is greatly enhanced.

Keywords

TRANSITION DECOHERENCE
CRITICAL ENVIRONMENT
QUANTUM DECOHERENCE
QUANTUM CRITICAL
PHASE TRANSITION
COLEMAN APPROACH
QUANTUM SYSTEM
MODEL

All Related Versions

Version 1, 2005-09-01, ArXiv
Version 2, 2005-10-10, ArXiv
Version 3, 2005-10-12, ArXiv
Version 4, 2006-04-20, ArXiv
Version 5, 2006-04-21, ArXiv
Published version: Physical Review Letters, 96 (14), 140604.

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