Seminar of Giuilo BIAGIONI (LENS, Florence)
- Séminaire (général)
- Evénement scientifique
Seminar of Giuilo BIAGIONI (LENS, Florence), on Friday 17 November 2023 at 1:30pm in the Auditorium of the Institut d'Optique Graduate School in Palaiseau, on the topic: "Superfluid fraction of a dipolar supersolid: from rotations to self-induced Josephson effect."
Abstract: "The supersolid is an exotic phase of matter featuring both superfluid and crystal-like properties. It was predicted long ago that the superfluid response of a supersolid should be reduced compared to a standard superfluid due to the competing crystal order. The so-called superfluid fraction quantifies this effect, ranging from 1 for a full superfluid to 0 for a classical crystal.
I will show our recent experiments aimed to probe the sub-unity superfluid fraction of a supersolid realized in a dipolar quantum gas. Studying the rotational response of the supersolid, we measured its moment of inertia and we demonstrated its non-classical behavior. To measure quantitatively the superfluid fraction, we excited Josephson oscillations between different supersolid sites, demonstrating that it can behave as a self-induced Josephson junction. I will also discuss future experiments in annular geometries."