arXiv subjects

D. Mouhanna

Publications and source records attributed to D. Mouhanna.

38 records · Page 3Linked to original sources

arXiv1999

Correlated Fermions in a one-dimensional quasiperiodic potential

We study analytically one-dimensional interacting spinless fermions in a Fibonacci potential. We show that the effects of the quasiperiodic modulation are intermediate between those of a commensurate potential and a disordered one. The system exhibits a metal-insulator transition whose position depends both on the strength of the correlations and on the position of the Fermi level. Consequently, the conductivity displays a power law like size and frequency behaviour characterized by a non trivial exponent.

cond-mat↗

arXiv1998

The Wilson Renormalization Group Approach of the Principal Chiral Model around Two Dimensions

We study the Principal Chiral Ginzburg-Landau-Wilson model around two dimensions within the Local Potential Approximation of an Exact Renormalization Group equation. This model, relevant for the long distance physics of classical frustrated spin systems, exhibits a fixed point of the same universality class that the corresponding Non-Linear Sigma model. This allows to shed light on the long-standing discrepancy between the different perturbative approaches of frustrated spin systems.

hep-th↗