Dynamics of a Local Perturbation in the XY Model. I—Approach to Equilibrium |
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| Authors: | D. B. Abraham,E. Barouch,G. Gallavotti,A. Martin-L f |
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| Affiliation: | D. B. Abraham,E. Barouch,G. Gallavotti,A. Martin-Löf |
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| Abstract: | 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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