Abstract
An expression for the ratio of the natural frequencies of the classical two-spinXXZ system is determined. These are the frequencies of the angle variables and the expression does not require the system trajectories for its evaluation.
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N. Srivastava, and G. Müller,Z. Phys. B Condensed Matter 81:137 (1990).
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Gade, S., Gade, E. Natural frequencies of the classical two-spinXXZ system. J Stat Phys 68, 1143–1145 (1992). https://doi.org/10.1007/BF01048890
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DOI: https://doi.org/10.1007/BF01048890