Quantum entanglement dynamics and decoherence wave in spin chains at finite temperatures

S. D. Hamieh and M. I. Katsnelson
Phys. Rev. A 72, 032316 – Published 13 September 2005

Abstract

We analyze the quantum entanglement at the equilibrium in a class of exactly solvable one-dimensional spin models at finite temperatures and identify a region where the quantum fluctuations determine the behavior of the system. We probe the response of the system in this region by studying the spin dynamics after projective measurement of one local spin which leads to the appearance of the “decoherence wave.” We investigate time-dependent spin correlation functions, the entanglement dynamics, and the fidelity of the quantum information transfer after the measurement.

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  • Received 13 April 2005

DOI:https://doi.org/10.1103/PhysRevA.72.032316

©2005 American Physical Society

Authors & Affiliations

S. D. Hamieh and M. I. Katsnelson

  • Institute for Molecules and Materials, Radboud University of Nijmegen, 6525 ED Nijmegen, The Netherlands

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Vol. 72, Iss. 3 — September 2005

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