Emergence of Decoherence as Phenomenon in Quantum Phase Transition

Preprint

1 September 2005

preprint
Published by arXiv in arXiv

Abstract

We consider the intrinsic relation between the appearance of classicality of a quantum system and the occurrence of quantum phase transition (QPT) in the environment surrounding this system, and study in detail the novel mechanism of quantum decoherence based on QPT with a generalized Hepp-Coleman model where the quantum system is a two level system and the environment is the Ising spin chain interacting with the quantum system. It is discovered that, the quantum decoherence of the quantum system can be accompanied by the quantum critical phenomenon induced by the effective transverse back-action of the quantum system on the environment.

Keywords

QUANTUM PHASE TRANSITION
QUANTUM DECOHERENCE
QUANTUM SYSTEM
LEVEL SYSTEM
TRANSITION
QPT

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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