Jul 22 – 25, 2019
ECT* - Villa Tambosi
Europe/Rome timezone
Abstracts submission open. Posters do not require abstract submission.

Superradiant effects in Bose-Einstein condensates: amplification and instabilities

Jul 24, 2019, 3:00 PM
15m
Meeting room (ECT* - Villa Tambosi)

Meeting room

ECT* - Villa Tambosi

Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy

Speaker

Luca Giacomelli (Università di Trento and CNR-INO BEC Center)

Description

Superradiance is a radiation enhancement effect occurring by energy extraction from a rotating spacetime. Being a kinematical effect it can also happen in gravitational analogues, where the energy for the amplification is extracted from the fluid motion. We discuss such an effect in Bose-Einstein condensates with different geometries and show that the well known instability of multiply quantized vortices can be attributed to a dispersive version of the ergoregion instability based on superradiant amplification in rotating spacetimes with no horizon.

Primary authors

Luca Giacomelli (Università di Trento and CNR-INO BEC Center) Iacopo carusotto (INO-CNR BEC Center, Trento)

Presentation materials