CASUS Institute Seminar, Massimo Boninsegni, University of Alberta, Edmonton, Canada

Massimo is a Professor in the Department of Physics at the University of Alberta’s Faculty of Science. He is an expert in Bose condensation, Computational physics, Condensed Matter Physics and Quantum fluids.

For a long time it was believed that solid helium-4 might be a good candidate for the observation of the elusive “supersolid” phase of matter, but it is now accepted that that phenomenon does not take place in such a physical system. Thus, interest has shifted to assemblies of Bose particles possessing a finite electric or magnetic dipole moment. These systems have been extensively explored experimentally in recent times.
The long ranged, and isotropic character of the interaction paves the way to the stabilization of novel, exotic phases of matter, including a supersolid one, which consists of ordered arrays of filaments.

In this talk, results of first principle theoretical studies of the phase diagram of dipolar bosons carried out in Massimo’s group will be reviewed, with particular emphasis on aspects directly connected to recent experimental observations, e.g., the occurrence of a “roton” minimum in the elementary excitation spectrum.

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