Spectral properties of a partially spin-polarized one-dimensional Hubbard/Luttinger superfluid

Details Spectral properties of a partially spin-polarized one-dimensional Hubbard/Luttinger superfluid Spectral properties of a partially spin-polarized one-dimensional Hubbard/Luttinger superfluid

2008-09-17

arxiv.org/abs/0809.3024v1

Phys. Rev. B 79, 100507(R) (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 low resolution color figs

Scientific paper

10.1103/PhysRevB.79.100507

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.

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