14–16 oct. 2025
IPhT
Fuseau horaire Europe/Paris

Ergoregion Instabilities in a Horizon-less Black Hole Analogue

16 oct. 2025, 12:20
20m
Amphi Claude Bloch (IPhT)

Amphi Claude Bloch

IPhT

CEA, Orme des Merisiers Bat 774, 91191 Gif-sur-Yvette
Talk

Orateur

Paula Calizaya Cabrera (Laboratoire Kastler Brossel)

Description

Rotational superradiance has long been associated with black holes—but it can actually emerge in any system featuring an ergoregion. The aim of this work is to show that rotating polariton quantum fluids provide a powerful platform to observe this phenomenon, as here one may study ergoregions in isolation (i.e without a horizon). Because ergoregions are intrinsically unstable, they generate dynamical instabilities that are tightly linked to superradiance. We demonstrate via numerical simulations that such instabilities are indeed present in this rotating system of polaritons, showing that experimental measurement of superradiance in such a system may soon be achieved.

Auteur

Paula Calizaya Cabrera (Laboratoire Kastler Brossel)

Co-auteurs

Dr Adrià Delhom (UCM, Madrid) Prof. Ivan Agullo (Louisiana State University) Dr Maxime Jacquet (Laboratoire Kastler Brossel)

Documents de présentation