Category: List of Bases 2012 Throughout the year RESEARCH IN CONDENSED MATTER PHYSICS 

Title:

Seminar on Disorder and strong electron correlations: "Bose statistics, crystallization and quantum jamming"

Start Time:

11:30

Location:

ICTP (Leonardo da Vinci Building Luigi Stasi Seminar Room)

Contact:

M. Poropat

Speaker(s):

Massimo BONINSEGNI (University of Alberta, Edmonton )

Description:

Indistinguishability of particles plays a major role in destabilizing crystalline order in Bose systems.
In this talk, this effect will be semi-quantitatively described in terms of damped quasi-particle modes, and illustrated in the dual language of Feynman paths. A robust confirmation of this prediction is provided by means of first-principle simulations of dipolar bosons and bulk condensed helium-four. Two major implications are that a) contrary to conventional wisdom, zero-point motion alone cannot prevent helium-four crystallization at low temperature, at saturated vapour pressure, and b) Bose statistics leads to quantum jamming at finite temperature, dramatically enhancing the metastability of superfluid glasses. Only theoretical studies in which quantum statistics is fully included can reliably address these issues.