Statut  Confirmé 
Série  IPNTHEO 
Domaines  nuclth 
Date  Mercredi 7 Juin 2017 
Heure  11:30 
Institut  IPN 
Salle  IPN, Bâtiment 100, salle A 015 
Nom de l'orateur  Bazak 
Prenom de l'orateur  Betzalel 
Addresse email de l'orateur  
Institution de l'orateur  IPN, Orsay 
Titre  Universal States and Efimov Physics in Fermionic Mixtures 
Résumé  The system of few identical fermions interacting resonantly with a distinguishable atom exhibits a rich and interesting physics, including universal states and the celebrated Efimov effect. The (2+1) system, composed of two heavy fermions and lighter atom, supports a universal trimer state if the ratio of the particle masses exceeds critical value. For even larger mass ratio the system becomes Efimovian, introducing a threebody scale and showing geometric series of bound states. Interestingly, this trend continues in the (3+1) system as well as in the (4+1) system, having their own universal states and pure (N+1)body Efimov effects. Adding another particle, however, this series seems to stop. This should be a sign of a shell structure and screening effects, which may shed light on the crossover from the fewbody systems to the manybody polaron case. 
Numéro de preprint arXiv  
Commentaires  $$ 
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