Supersolid order from disorder, or how do bosons overcome their frustration?
Oct 5, 2005
3:30PM to 4:30PM
Date(s) - 05/10/2005
3:30 pm - 4:30 pm
Title: Supersolid order from disorder, or how do bosons overcome their frustration?
Speaker: Dr. Arun Paramekanti
Institute: University of Toronto
Location: ABB 102
Supersolids are systems which exhibit superfluid order as well as density order with breaking of continuous or lattice translational symmetries. Such a phase had been envisioned long ago theoretically in the context of He-4. Recent interest in supersolids arises in two different experimental systems — (1) He-4 under pressure appears to show indications of superflow at low temperatures, and (2) various quantum phases of lattice boson systems are beginning to be realized using cold atoms confined on optical lattices. In this talk I will briefly review earlier work, stress on the need to examine routes to supersolidity in simple models, and describe our work on a lattice model of bosons with frustrated interactions which exhibits a supersolid phase over a wide region of the phase diagram.