2 papers
cond-mat.str-el2008
Finite size effects for the gap in the excitation spectrum of the one-dimensional Hubbard model
M. Colomé-Tatché, S. I. Matveenko, G. V. Shlyapnikov
We study finite size effects for the gap of the quasiparticle excitation spectrum in the weakly interacting regime one-dimensional Hubbard model with on-site attraction. Two type o…
cond-mat.str-el2008
Isospin excitations of a trapped 1D gas of attractively interacting fermions
M. Colomé-Tatché, G. V. Shlyapnikov, A. M. Tsvelik
We consider a gas of fermions with a short-range attractive intercomponent interaction in a parabolic external potential and derive the conditions of the local density approximatio…