Spectral Properties of Interacting One-Dimensional Spinless Fermions

Details Spectral Properties of Interacting One-Dimensional Spinless Fermions Spectral Properties of Interacting One-Dimensional Spinless Fermions

2010-02-05

arxiv.org/abs/1002.1147v2

J. Phys. Soc. Jpn. 79, 043707 (2010).

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 figures

Scientific paper

10.1143/JPSJ.79.043707

The spectral properties of the spinless fermion model with nearest-neighbor repulsive interactions on a one-dimensional lattice are investigated using the Bethe ansatz. Although its bulk quantities are exactly the same as those of the spin-1/2 XXZ chain, the difference in the statistics of particles causes substantial effects on spectral features, such as gapless points of dispersion relations and line shapes of spectral functions. In this Letter, we clarify the origin of the differences in spectral features between fermionic and bosonic systems in terms of Bethe ansatz solutions. We also confirm that the two-string solutions have considerable spectral weights in the high-energy regime.

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