Dynamics of a Local Perturbation in the X-Y Model II—Excitations |
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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: | Excitations of a single spin embedded in the X Y chain are studied. We find that the magnetization does not approach equilibrium, even if the external magnetic field approaches a non-zero limit, and that oscillatory excitation resonates with the edge of the one-particle spectrum band. |
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