Finite-size effects in the integrable XXZ Heisenberg model with arbitrary spin

verfasst von

Holger Frahm, Nai-Chang Yu

Abstract

The finite-size effects in the spectrum of the integrable XXZ Heisenberg chain with arbitrary spin-S are studied analytically on the basis of the string hypothesis for bound states and numerically by solving the associated Bethe ansatz equations. The finite-size corrections to the spectrum and to the low-temperature behaviour of the free energy are found to be similar to the universal predictions for conformally invariant theories, although the model is, in general, not Lorentz invariant, since it can have an arbitrary number of branches for low-energy excitations with different Fermi velocities depending on the value of S and the anisotropy parameter gamma .

Externe Organisation(en)

University of Virginia

Typ

Artikel

Journal

Journal of Physics A: General Physics

Band

23

Seiten

2115-2132

Anzahl der Seiten

18

ISSN

0305-4470

Publikationsdatum

07.06.1990

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Statistische und nichtlineare Physik, Physik und Astronomie (insg.), Mathematische Physik

Elektronische Version(en)

https://doi.org/10.1088/0305-4470/23/11/032 (Zugang: Unbekannt)