Superfrustration of charge degrees of freedom
Abstract
We review recent results, obtained with P. Fendley, on frustration of quantum charges in lattice models for itinerant fermions with strong repulsive interactions. A judicious tuning of kinetic and interaction terms leads to models possessing supersymmetry. In such models frustration takes the form of what we call superfrustration: an extensive degeneracy of supersymmetric ground states. We present a gallery of examples of superfrustration on a variety of 2D lattices.
- Publication:
-
European Physical Journal B
- Pub Date:
- August 2008
- DOI:
- 10.1140/epjb/e2008-00150-9
- arXiv:
- arXiv:0709.4120
- Bibcode:
- 2008EPJB...64..543H
- Keywords:
-
- 05.30.-d Quantum statistical mechanics;
- 11.30.Pb Supersymmetry;
- 71.27.+a Strongly correlated electron systems; heavy fermions;
- 05.30.-d;
- 11.30.Pb;
- 71.27.+a;
- Quantum statistical mechanics;
- Supersymmetry;
- Strongly correlated electron systems;
- heavy fermions;
- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- 8 pages, 5 figures, contribution to the proceedings of the XXIII IUPAP International Conference on Statistical Physics (2007) in Genova, Italy