Abstract
Time-dependent temperature correlators of the anisotropic Heisenberg XY chain are calculated by the integration techniques with respect to Grassmann variables. For a chain of length M, the correlators are represented as the determinants of 2M × 2M matrices. In the thermodynamic limit, the correlation functions are expressed in terms of the Fredholm determinants of linear integral operators with matrix kernels. Bibliography: 32 titles.
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Kapitonov, V.S., Pronko, A.G. Time-Dependent Correlators of Local Spins of the One-Dimensional XY Heisenberg Chain. Journal of Mathematical Sciences 115, 2009–2032 (2003). https://doi.org/10.1023/A:1022655914303
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DOI: https://doi.org/10.1023/A:1022655914303