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arXiv:hep-th/0703147 · Nuclear Physics B

Supersymmetric Bethe ansatz and Baxter equations from discrete Hirota dynamics

Vladimir Kazakov, Alexander S. Sorin, Anton Vladimirovich Zabrodin

Published Aug 8, 2007• 130 citations
arXivHTMLPDF
DOI
10.1016/j.nuclphysb.2007.06.025

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The recent progress in revealing classical integrable structures in quantum models solved by Bethe ansatz is reviewed. Fusion relations for eigenvalues of quantum transfer matrices can be written in the form of classical Hirota’s bilinear difference equation. This equation is also known as the completely discretized version of the 2D Toda lattice. We explain how one obtains the specific quantum results by solving the classical equation. The auxiliary linear problem for the Hirota equation is shown to generalize Baxter’s T-Q relation.
The recent progress in revealing classical integrable structures in quantum models solved by Bethe ansatz is reviewed. Fusion relations for eigenvalues of quantum transfer matrices can be written in the form of classical Hirota's bilinear difference equation. This equation is also known as the completely discretized version of the 2D Toda lattice. We explain how one obtains the specific quantum results by solving the classical equation. The auxiliary linear problem for the Hirota equation is shown to generalize Baxter's T-Q relation.