Statut  Confirmé 
Série  APCTH 
Domaines  hepth 
Date  Mardi 18 Décembre 2018 
Heure  14:00 
Institut  APC 
Salle  646 A  Mondrian 
Nom de l'orateur  Michel 
Prenom de l'orateur  Florent 
Addresse email de l'orateur  
Institution de l'orateur  Durham University 
Titre  Testing relativistic vacuum decay with cold atoms 
Résumé  Vacuum decay is a prominent example of strongly nonlinear effects in quantum field theory with potentially important implications for cosmology, relating to phase transitions in the early universe or the supposed metastability of the current Higgs vacuum. Although a general theoretical description was laid out in the 80s by Sidney Coleman and his collaborators, fundamental questions pertaining to the backreaction of true vacuum bubbles on spacetime curvature and their correlations remain so far unanswered, calling for different approaches to the problem. In this talk, after a brief review of Coleman's theory emphasizing its genericness and limitations, I will present a recentlyproposed coldatoms model in which some of these ideas could be tested in laboratory experiments. I will discuss the mathematical correspondence between the two problems and focus on how a localized defect changes the decay rate, taking the example of a vortex in a BoseEinstein condensate and comparing with the effect of a black hole in a relativistic theory. 
Numéro de preprint arXiv  
Commentaires  
Fichiers attachés 
Pour obtenir l' affiche de ce séminaire : [ Postscript  PDF ]

[ English version ] 