Superfrustration of charge degrees of freedom

Understand

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.