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Dr. Luca Lepori

Laboratoire de physique quantique, IPCMS-ISIS, Université de Strasbourg and CNRS

Friday, June 28th, 2013 at 03:00:00 PM  

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

Published on-line at 11:12:51 AM on Thursday, June 27th, 2013

Fractional vortices with non-abelian modes in ultracold color-flavor locked phases

Ultracold fermionic mixtures in optical lattices hosting superfluid phases show exotic soliton structures.

I describe a setup of ultracold fermionic mixtures in optical lattices able to host superfluid phases with symmetry obtained by locking independent invariance groups of the normal state. Due to their peculiar symmetry, these phases can also show exotic soliton structures, as vortices with semi-integer flux and gapless non-Abelian Goldstone modes localized on them. The origin of the non-abelianity, the braiding properties, the mechanism and the consequences of fractionality for such vortices are discussed.

The scenario proposed displays remarkable similarities to what arises in ultra-dense QCD matter, as in the core of some neutron stars. A discussion about the experimental detection of locked phases and non-abelian fractional vortices is as well provided.

For further informations, please contact Dr. Leonardo Fallani.