1209.3556 (Akiyuki Tokuno et al.)

Dynamical property of $N$-component fermionic Hubbard models in the
spin-incoherent high temperature regime    [PDF]

Akiyuki Tokuno, Thierry Giamarchi

Strongly correlated Hubbard systems extended to $N$-component fermions are studied. We focus on the intermediate temperature regime between magnetic superexchange and interaction energy, which is relevant to current ultra-cold fermionic atom experiments. The $N$-component fermions are represented by slave particles, and, by implementing a diagrammatic analysis from the atomic limit, spectral functions are analytically obtained as a function of temperature, filling factor and the component number $N$. Furthermore, this analytical technique is also applied to the calculation of lattice modulation experiments. The production rate of double occupancy induced by modulation of an optical lattice potential is analytically calculated.

View original: http://arxiv.org/abs/1209.3556