Asymptotic behaviour of two-point functions in multi-species models

Autor: Karol K. Kozlowski, Eric Ragoucy
Jazyk: angličtina
Rok vydání: 2016
Předmět:
Zdroj: Nuclear Physics B, Vol 906, Iss C, Pp 241-288 (2016)
Druh dokumentu: article
ISSN: 0550-3213
1873-1562
DOI: 10.1016/j.nuclphysb.2016.03.005
Popis: We extract the long-distance asymptotic behaviour of two-point correlation functions in massless quantum integrable models containing multi-species excitations. For such a purpose, we extend to these models the method of a large-distance regime re-summation of the form factor expansion of correlation functions. The key feature of our analysis is a technical hypothesis on the large-volume behaviour of the form factors of local operators in such models. We check the validity of this hypothesis on the example of the SU(3)-invariant XXX magnet by means of the determinant representations for the form factors of local operators in this model. Our approach confirms the structure of the critical exponents obtained previously for numerous models solvable by the nested Bethe Ansatz.
Databáze: Directory of Open Access Journals
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