ESI Programme and Workshop "Carrollian physics and holography"April 1  April 26, 2024Aim of the programmeCarrollian physics and holographyCarrollian physics appeared for the first time out of a mathematical curiosity in a work of LévyLeblond: what if, instead of taking the usual nonrelativistic limit of the Poincaré group where the speed of light c is taken to ∞, one considers the opposite limit, namely c→0? While the first limit gives rise to the familiar Galilean group, the second leads to the socalled Carroll group. In a Carrollian limit (c→0), the lightcones collapse along the time axis, which means that particles can no longer move and two spacetime events are causally disconnected. This absence of causality, as well as arbitrarinesses of time intervals, reminded LévyLeblond of Lewis Carroll's book Through the lookingglass, which is the origin for the name of this ultralocal limit of the Poincaré group. While such spacetimes seem a priori to be too strange to be of any physical relevance, there has been recently a surge of interest in Carrollian physics. It is quite a remarkable fact that, indeed, Carrollian physics naturally appear in the context of the geometry of null surfaces and the associated BondiMetznerSachs symmetries, but also black hole horizons, inflationary cosmology, fluid/gravity and holographic correspondences, as well as limits of Einstein gravity. The ESI programme is expected to foster further progress on the following developments:
Relevance to the local community: Vienna hosts two major Universities where pertinent research in theoretical physics is performed, namely the University of Vienna (coorganiser Stefan Fredenhagen, local organizer Stefan Prohazka as well as additional faculty and postdocs) and TU Wien (coorganiser Daniel Grumiller, local organizer Adrien Fiorucci as well as additional faculty and postdocs). Apart from additional fostering of the research expertise in Carrollian physics and flat space holography, the ESI programme will also provide the means to introduce new students (master as well as Ph.D.) and young postdocs to these exciting and timely topics, while providing the means for discussions with leading experts in the research fields on which the ESI programme will focus. VenueThe programme and workshop will take place at the ErwinSchrödinger International Institute for Mathematics and Physics. Here is practical info for guests. Useful linksContact the organizers by email
