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Transfer matrix spectrum for cyclic representations of the 6-vertex reflection algebra I
by J. M. Maillet, G. Niccoli, B. Pezelier
- Published as SciPost Phys. 2, 009 (2017)
|As Contributors:||Jean Michel Maillet · Giuliano Niccoli|
|Arxiv Link:||http://arxiv.org/abs/1607.02983v3 (pdf)|
|Date submitted:||2017-02-21 01:00|
|Submitted by:||Maillet, Jean Michel|
|Submitted to:||SciPost Physics|
We study the transfer matrix spectral problem for the cyclic representations of the trigonometric 6-vertex reflection algebra associated to the Bazhanov-Stroganov Lax operator. The results apply as well to the spectral analysis of the lattice sine-Gordon model with integrable open boundary conditions. This spectral analysis is developed by implementing the method of separation of variables (SoV). The transfer matrix spectrum (both eigenvalues and eigenstates) is completely characterized in terms of the set of solutions to a discrete system of polynomial equations in a given class of functions. Moreover, we prove an equivalent characterization as the set of solutions to a Baxter's like T-Q functional equation and rewrite the transfer matrix eigenstates in an algebraic Bethe ansatz form. In order to explain our method in a simple case, the present paper is restricted to representations containing one constraint on the boundary parameters and on the parameters of the Bazhanov-Stroganov Lax operator. In a next article, some more technical tools (like Baxter's gauge transformations) will be introduced to extend our approach to general integrable boundary conditions.
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Published as SciPost Phys. 2, 009 (2017)
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