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Phase behaviors of strongly correlated Fermi gases in one-dimensional confinements (Articolo in rivista)

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Phase behaviors of strongly correlated Fermi gases in one-dimensional confinements (Articolo in rivista) (literal)

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Abedinpour, SH; Bakhtiari, MR; Xianlong, G; Polini, M; Rizzi, M; Tosi, MP (2007)
Phase behaviors of strongly correlated Fermi gases in one-dimensional confinements
in Laser physics
(literal)

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Abedinpour, SH; Bakhtiari, MR; Xianlong, G; Polini, M; Rizzi, M; Tosi, MP (literal)

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NEST, CNR, INFM, I-56126 Pisa, Italy; Scoula Normale Super, I-56126 Pisa, Italy (literal)

Titolo

Phase behaviors of strongly correlated Fermi gases in one-dimensional confinements (literal)

Abstract

We report on the ground state of models for strongly correlated one-dimensional Fermi systems by means of theoretical studies of two-component atomic Fermi gases in highly anisotropic harmonic traps. In this context, we consider (i) the Gaudin-Yang model for a Luttinger liquid with repulsive interactions, including an analysis of the emergence of Wigner molecules in the 2k(F) -> 4k(F) crossover, and (ii) the lattice Hubbard model yielding Luttinger liquid and Mott insulator or band-insulator phases for repulsive interactions and the Luther-Emery phase for attractive interactions, including in the former case an analysis of the role of disorder. Our calculations use novel versions of density and spin-density functional theory and a density-matrix renormalization-group technique. We also discuss preliminary results and future perspectives in the study of nonsymmetric two-component Fermi gases. (literal)

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