Séminaire du LPTMS: Pascal Naidon

Two impurities in a Bose-Einstein condensate: from the Yukawa to the Efimov attraction

Pascal Naidon (RIKEN, Japan)

The properties of two particles immersed in a Bose-Einstein condensate are investigated using a variational approach. These properties can be interpreted in terms of a boson-mediated interaction. For a weak particle-boson attractive interaction, the two particles form two free attractive polarons that interact through a weak boson-mediated Yukawa attraction. For suffciently strong interactions, the boson-mediated interaction turns into an Efimov attraction leading to the binding of the two particles and one boson into Efimov trimers. It is found that these in-medium Efimov trimers exist for weaker interactions than in vacuum.

Reference: P. Naidon, Two impurities in a Bose-Einstein condensate: from Yukawa to Efimov attracted polarons, preprint cond-mat arXiv:1607.04507

Date/Time : 07/02/2017 - 11:00 - 12:00

Location : LPTMS, salle 201, 2ème étage, Bât 100, Campus d'Orsay