Regensburg 2013 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 25: Correlated Electrons: Low-Dimensional Systems - Models 3
TT 25.7: Topical Talk
Dienstag, 12. März 2013, 11:15–11:45, H9
One-dimensional fermion systems beyond the Luttinger Liquid paradigm — •Thomas L. Schmidt1,2, Adilet Imambekov3, and Leonid I. Glazman1 — 1Department of Physics, Yale University, New Haven, Connecticut 06520, USA — 2Department of Physics, University of Basel, CH-4056 Basel, Switzerland — 3Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
For many years, Luttinger liquid theory has served as a useful paradigm for the description of 1D quantum fluids in the limit of low energies. This theory is based on a linearization of the dispersion relation of the particles constituting the fluid. In this talk, I will review recent progress in understanding 1D fermion systems beyond the low-energy limit, where the nonlinearity of the dispersion relation becomes essential. I will present results for the dynamic correlation functions of spinless and spinful fermion systems, and discuss the fate of spin-charge separation, one of the hallmarks of the linear Luttinger liquid theory, beyond the low-energy limit.