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Dynamics of a Local Perturbation in the XY Model. I—Approach to Equilibrium

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The magnetisation and spin correlation functions of the X–Y model are analysed exactly when the system is subjected to a local perturbation of the magnetic field in the z‐direction. When such a perturbation is removed, these quantities approach their equilibrium values asymptotically as (time)−1.
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Document Type: Research Article

Affiliations: 1: Massachusetts Institute of Technology 2: Rockefeller University

Publication date: June 1, 1971

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