Fermionic Basis in Conformal Field Theory and Thermodynamic Bethe Ansatz for Excited States II

• Published in: Symmetry, Integrability and Geometry: Methods and Applications
• Date: 2025
• Main Authors: Adler, Sergei, Boos, Hermann
• Format: Article
• Language: English
• Published: Інститут математики НАН України 2025
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/212881
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Fermionic Basis in Conformal Field Theory and Thermodynamic Bethe Ansatz for Excited States II. Sergei Adler and Hermann Boos. SIGMA 21 (2025), 010, 21 pages

We consider the XXZ spin chain in the scaling limit in the Matsubara direction. The main result of this paper is new representations for the functions Ψ(, κ) and Θ(, ; κ, α) associated with the function ω(ζ, ξ; κ, κ) found in the expression for the correlation function of the generators of the fermi...