• Medientyp: E-Artikel
  • Titel: Elliptic BCS-Richardson model and the modified algebraic Bethe ansatz
  • Beteiligte: Skrypnyk, T
  • Erschienen: IOP Publishing, 2023
  • Erschienen in: Journal of Physics A: Mathematical and Theoretical, 56 (2023) 20, Seite 205202
  • Sprache: Nicht zu entscheiden
  • DOI: 10.1088/1751-8121/acc857
  • ISSN: 1751-8113; 1751-8121
  • Entstehung:
  • Anmerkungen:
  • Beschreibung: <jats:title>Abstract</jats:title> <jats:p>We consider the elliptic Gaudin-type model in an external magnetic field (Skrypnyk T 2005 <jats:italic>Phys. Lett.</jats:italic> A <jats:bold>334</jats:bold> 390–9; Skrypnyk T 2005 <jats:italic>Phys. Lett.</jats:italic> A <jats:bold>347</jats:bold> 266–7; Skrypnyk T 2006 <jats:italic>J. Geom. Phys.</jats:italic> <jats:bold>57</jats:bold> 53–67; Skrypnyk T 2006 <jats:italic>J. Math. Phys.</jats:italic> <jats:bold>47</jats:bold>; Skrypnyk T 2007 <jats:italic>J. Phys.</jats:italic> A <jats:bold>40</jats:bold> 1611–23; Skrypnyk T 2019 <jats:italic>Nucl. Phys.</jats:italic> <jats:bold>B</jats:bold> 941 225–48) associated with non-skew-symmetric elliptic <jats:italic>r</jats:italic>-matrix (Skrypnyk T 2005 <jats:italic>Phys. Lett.</jats:italic> A <jats:bold>334</jats:bold> 390–9; Skrypnyk T 2005 <jats:italic>Phys. Lett.</jats:italic> A <jats:bold>347</jats:bold> 266–7; Skrypnyk T 2006 <jats:italic>J. Geom. Phys.</jats:italic> <jats:bold>57</jats:bold> 53–67; Skrypnyk T 2006 <jats:italic>J. Math. Phys.</jats:italic> <jats:bold>47</jats:bold>). Using them we construct a new integrable fermion Hamiltonian of the Richardson type. We use the modified algebraic Bethe ansatz obtained for integrable models with the considered elliptic <jats:italic>r</jats:italic>-matrix in (Skrypnyk T 2023 <jats:italic>Nucl. Phys.</jats:italic> B <jats:bold>988</jats:bold> 116102) and find the spectrum of the obtained Richardson-type Hamiltonian in terms of solutions of the modified Bethe equations. The obtained results generalize our previous results on Richardson-type models (Skrypnyk T 2022 <jats:italic>Nucl. Phys.</jats:italic> B <jats:bold>975</jats:bold> 115679).</jats:p>