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Dr. Markus Mueller

ICTP Trieste

Monday, May 7th, 2012 at 11:30:00 AM  

Conference room Querzoli - LENS - via Nello Carrara 1 - Sesto Fiorentino (Florence)

Published on-line at 02:42:44 PM on Thursday, May 3rd, 2012

Localization, superfluidity and the role of quantum statistics in strongly interacting Bose glasses

Three very cold experiences from Innsbruck: cold atoms to study universal few-body physics, interspecies scattering properties and Erbium condensates.

Bose glasses may arise both in superconductors with preformed pairs and in strongly interacting, disordered cold atom systems. They combine two distinct sources of non-ergodic behavior: (i) High barriers due to the frustration of interactions as in classical glasses, as well as (ii) Anderson localization and its many body generalization, which is a quantum effect. The interplay of these two different causes of glassiness is very interesting and multifaceted.

In this talk, I will discuss glassy supersolids, which result from the competition of glassy ordering and superfluidity of disordered bosons. An exactly solvable model is introduced to illustrate the salient effects, which electronic glassiness may have on the superfluid-insulator transition and many-particle localization in the Bose glass. Finally, I discuss the role of quantum statistics in the insulating phase and its important effect on magnetoresistance.

For further informations, please contact Prof. Giovanni Modugno.