246 citations · 620 across the 25 of their papers we have counts for
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Ti and Spi, Carrollian extended boundaries at timelike and spatial infinity
Jack Borthwick, Maël Chantreau, Yannick Herfray
The goal of this paper is to provide a definition for a notion of extended boundary at time and space-like infinity which, following Figueroa-O'Farril--Have--Prohazka--Salzer, we r…
Carrollian manifolds and null infinity: A view from Cartan geometry
Yannick Herfray
We discuss three different (conformally) Carrollian geometries and their relation to null infinity from the unifying perspective of Cartan geometry. Null infinity \emph{per se} com…
Tractor geometry of asymptotically flat spacetimes
Yannick Herfray
In a recent work it was shown that conformal Carroll geometries are canonically equipped with a null-tractor bundle generalizing the tractor bundle of conformal geometry. We here s…
Einstein gravity as a gauge theory for the conformal group
Yannick Herfray, Carlos Scarinci
General Relativity in dimension can be formulated as a gauge theory for the conformal group , along with an additional field reducing the structure group d…
Asymptotic Shear and the Intrinsic Conformal Geometry of Null-Infinity
Yannick Herfray
In this article we propose a new geometrization of the radiative phase space of asymptotically flat space-times: we show that the geometry induced on null-infinity by the presence…
New Avenues for Einstein's Gravity: from Penrose's Twistors to Hitchin's Three-Forms
Yannick Herfray
In this thesis we take Einstein theory in dimension four seriously, and explore the special aspects of gravity in this number of dimension. Among the many surprising features in di…