Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Domaines hep-th
Date Jeudi 19 Octobre 2017
Heure 10:00
Institut IHP
Salle 314
Nom de l'orateur Jokela
Prenom de l'orateur Niko
Addresse email de l'orateur
Institution de l'orateur University of Helsinki
Titre Holographic pinning in probe-brane models
Résumé In a holographic probe-brane model exhibiting a spontaneously spatially modulated CDW+SDW ground state, I will introduce explicit sources of symmetry breaking in the form of ionic and antiferromagnetic lattices. I will demonstrate pinning, in which the translational Goldstone mode is lifted by the introduction of explicit sources of translational symmetry breaking. The numerically computed optical conductivity fits very well to a Drude-Lorentz model with a small residual metallicity, precisely matching analytic formulas for the DC conductivity. I also demonstrate an instability of the striped phase in the presence of a large-amplitude ionic lattice.
Numéro de preprint arXiv
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