Pseudofermion dynamical theory for the spin dynamical correlation functions of the half-filled 1D Hubbard model

Carmelo, J.M.P. (Department of Physics, University of Minho, Campus Gualtar, Braga, P-4710-057, Portugal) (Center of Physics of University of Minho, University of Porto, Oporto, P-4169-007, Portugal) (Beijing Computational Science Research Center, Beijing, 100193, China) ; Čadež, T. (Beijing Computational Science Research Center, Beijing, 100193, China) (Department of Physics, University of Minho, Campus Gualtar, Braga, P-4710-057, Portugal) (Center of Physics of University of Minho, University of Porto, Oporto, P-4169-007, Portugal) (Jožef Stefan Institute, Ljubljana, 1000, Slovenia)

07 January 2016

Abstract: A modified version of the metallic-phase pseudofermion dynamical theory (PDT) of the 1D Hubbard model is introduced for the spin dynamical correlation functions of the half-filled 1D Hubbard model Mott–Hubbard phase. The Mott–Hubbard insulator phase PDT is applied to the study of the model longitudinal and transverse spin dynamical structure factors at finite magnetic field h , focusing in particular on the singularities at excitation energies in the vicinity of the lower thresholds. The relation of our theoretical results to both condensed-matter and ultra-cold atom systems is discussed.


Published in: Nuclear Physics B (2016)
Published by: Elsevier
DOI: 10.1016/j.nuclphysb.2016.01.009
License: CC-BY-3.0



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