Universal States and Efimov Physics in Fermionic Mixtures

Seminar
Quantum Optics Resnick seminar
QUEST Center event
Yes
Speaker
Betzalel Bazak, Physique Théorique Institut de Physique Nucléaire d’Orsay
Date
08/11/2017 - 15:00 - 14:00Add to Calendar 2017-11-08 14:00:00 2017-11-08 15:00:00 Universal States and Efimov Physics in Fermionic Mixtures 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 three-body 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 few-body systems to the many-body polaron case. Nano-center, 9th floor seminar room Department of Physics physics.dept@mail.biu.ac.il Asia/Jerusalem public
Place
Nano-center, 9th floor seminar room
Abstract

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 three-body 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 few-body systems to the many-body polaron case.

Last Updated Date : 02/11/2017