Abstract
We construct local M-operators for an integrable discrete-time version of the classical Heisenberg magnet by convoluting the twisted quantum trigonometric 4×4 R-matrix with certain vectors in its “quantum” space. Components of the vectors are identified with τ-functions of the model. Hirota's bilinear formalism is extensively used. The construction generalizes the known representation of M-operators in continuous-time models in terms of Lax operators and the classical τ-matrix.
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This paper was written at the request of the Editorial Board.
Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 125, No. 2, pp. 179–204, November, 2000.
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Zabrodin, A.V. Hidden quantumR-matrix in the discrete-time classical Heisenberg magnet. Theor Math Phys 125, 1455–1475 (2000). https://doi.org/10.1007/BF02551007
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DOI: https://doi.org/10.1007/BF02551007