# Antiperiodic dynamical 6-vertex model by separation of variables II: Functional equations and form factors

Abstract : We pursue our study of the antiperiodic dynamical 6-vertex model using Sklyanin's separation of variables approach, allowing in the model new possible global shifts of the dynamical parameter. We show in particular that the spectrum and eigenstates of the antiperiodic transfer matrix are completely characterized by a system of discrete equations. We prove the existence of different reformulations of this characterization in terms of functional equations of Baxter's type. We notably consider the homogeneous functional $T$-$Q$ equation which is the continuous analog of the aforementioned discrete system and show, in the case of a model with an even number of sites, that the complete spectrum and eigenstates of the antiperiodic transfer matrix can equivalently be described in terms of a particular class of its $Q$-solutions, hence leading to a complete system of Bethe equations. Finally, we compute the form factors of local operators for which we obtain determinant representations in finite volume.
Type de document :
Article dans une revue
Journal of Statistical Mechanics: Theory and Experiment, IOP Science, 2016, pp.033110
Domaine :

https://hal.archives-ouvertes.fr/hal-01300631
Contributeur : Claudine Le Vaou <>
Soumis le : lundi 11 avril 2016 - 11:59:00
Dernière modification le : mardi 16 janvier 2018 - 16:06:34

### Identifiants

• HAL Id : hal-01300631, version 1
• ARXIV : 1507.03404

### Citation

D. Levy-Bencheton, G. Niccoli, V. Terras. Antiperiodic dynamical 6-vertex model by separation of variables II: Functional equations and form factors. Journal of Statistical Mechanics: Theory and Experiment, IOP Science, 2016, pp.033110. 〈hal-01300631〉

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