Spectral properties of a partially spin-polarized one-dimensional Hubbard/Luttinger superfluid
arXiv:0809.3024 · doi:10.1103/PhysRevB.79.100507
Abstract
We calculate the excitation spectra of a spin-polarized Hubbard chain away from half-filling, using a high-precision momentum-resolved time-dependent Density Matrix Renormalization Group method. Focusing on the U<0 case, we present in some detail the single-fermion, pair, density and spin spectra, and discuss how spin-charge separation is altered for this system. The pair spectra show a quasi-condensate at a nonzero momentum proportional to the polarization, as expected for this Fulde-Ferrel-Larkin-Ovchinnikov-like superfluid.
4 pages, 3 low resolution color figs
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