On determinant representations of scalar products and form factors in the SoV approach: the XXX case

Nikolai Kitanine 1 J. M. Maillet 2 G. Niccoli 2 Véronique Terras 3
1 IMB - Institut de Mathématiques de Bourgogne [Dijon]
2 Phys-ENS - Laboratoire de Physique de l'ENS Lyon
3 LPTMS - Laboratoire de Physique Théorique et Modèles Statistiques
Abstract : In the present article we study the form factors of quantum integrable lattice models solvable by the separation of variables (SoVs) method. It was recently shown that these models admit universal determinant representations for the scalar products of the so-called separate states (a class which includes in particular all the eigenstates of the transfer matrix). These results permit to obtain simple expressions for the matrix elements of local operators (form factors). However, these representations have been obtained up to now only for the completely inhomogeneous versions of the lattice models considered. In this article we give a simple algebraic procedure to rewrite the scalar products (and hence the form factors) for the SoV related models as Izergin or Slavnov type determinants. This new form leads to simple expressions for the form factors in the homogeneous and thermodynamic limits. To make the presentation of our method clear, we have chosen to explain it first for the simple case of the XXX Heisenberg chain with anti-periodic boundary conditions. We would nevertheless like to stress that the approach presented in this article applies as well to a wide range of models solved in the SoV framework.
Keywords : baxter equation bazhanov-stroganov model bethe-ansatz dynamical correlation-functions exactly solved models gordon model heisenberg chain hidden grassmann structure magnetic-field quantum integrable models quantum separation of variables spin correlation-functions toda chain
Type de document :
Article dans une revue
Journal of Physics A: Mathematical and Theoretical, IOP Publishing, 2016, 49 (10), pp.104002. <10.1088/1751-8113/49/10/104002 >
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https://hal-univ-bourgogne.archives-ouvertes.fr/hal-01410973
Contributeur : Imb - Université de Bourgogne <>
Soumis le : mardi 6 décembre 2016 - 18:56:28
Dernière modification le : vendredi 17 février 2017 - 16:13:17

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TDS-MACS | ENS-LYON | IMB_UMR5584 | UNIV-PARIS-SACLAY

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Nikolai Kitanine, J. M. Maillet, G. Niccoli, Véronique Terras. On determinant representations of scalar products and form factors in the SoV approach: the XXX case. Journal of Physics A: Mathematical and Theoretical, IOP Publishing, 2016, 49 (10), pp.104002. <10.1088/1751-8113/49/10/104002 >. <hal-01410973>

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