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

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

2005-07-28

arxiv.org/abs/quant-ph/0507266v1

Physics

Quantum Physics

Phys. Rev. A, accepted for publication

Scientific paper

10.1103/PhysRevA.72.032316

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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