2002/11/30 by A. A. Ovchinnikov, А. А. Овчинников · 1 citation
Chemistry · Computer Science · Mathematics · Physics and Astronomy · #Algebraic structures and combinatorial models #Molecular spectroscopy and chirality #Quantum Information and Cryptography #hep-th #math-ph #math.MP #nlin.SI
paper · pdf · doi:10.1016/s0550-3213(03)00218-9
published as Nucl.Phys.B703:363-390,2003 · LaTex, 30 pages, several references added
arxiv created 2003/02/19 · openalex publication_date 2003/04/23 · arxiv updated 2011/02/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We propose the new family of the exactly solvable discrete state BCS - type Hamiltonians based on its relationship to the six-vertex model in the quasiclassical limit both in the rational and the trigonometric cases. We establish the relation of the BCS Hamiltonian and its eigenfunctions to the form of the monodromy matrix in the F-basis. Using the Algebraic Bethe Ansatz method for the standard BCS model with equal coupling the expression for the general scalar product and the determinant expressions for the physically interesting correlation functions for the finite number of sites which can be used in the numerical and analytical computations are obtained. We also compare the correlators with the results obtained by means of the variational method.