Hélène Perrin 
Université Sorbonne Paris Nord

Abstract: Superfluid quantum gases on a shell

Quantum gases offer an exquisite playground for the study of superfluid dynamics: they can be easily manipulated, confined in arbitrary potential landscape, and imaged efficiently. Trapped superfluid quantum gases develop specific collective modes, require a minimum - critical - rotation rate to be set into rotation, beyond which they develop quantum vortices, that eventually arrange into a regular lattice (see image). The confinement geometry can play a crucial role in the superfluid dynamics. In this talk, I will present a couple of experiments where a quantum gas is confined on the surface of shell. I will discuss the fate of the gas as it rotates fast at the bottom of the shell, as well as tentatives to fill the shell with atoms to get a full bubble of superfluid.