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8 papers · 2 filters
Ehlers, Carroll, Charges and Dual Charges
Nehal Mittal, P. Marios Petropoulos, David Rivera-Betancour +1
We unravel the boundary manifestation of Ehlers' hidden Möbius symmetry present in four-dimensional Ricci-flat spacetimes that enjoy a time-like isometry and are Petrov-algebraic.…
Logarithmic supertranslations and supertranslation-invariant Lorentz charges
Oscar Fuentealba, Marc Henneaux, Cédric Troessaert
We extend the BMS(4) group by adding logarithmic supertranslations. This is done by relaxing the boundary conditions on the metric and its conjugate momentum at spatial infinity in…
Classical Gravitational Observables from the Eikonal Operator
Paolo Di Vecchia, Carlo Heissenberg, Rodolfo Russo +1
We propose two possible eikonal operators encoding the effects of classical radiation as coherent states of gravitons and show how to compute from them different classical observab…
Magnetic Carrollian gravity from the Carroll algebra
Andrea Campoleoni, Marc Henneaux, Simon Pekar +2
We explicitly establish the equivalence between the magnetic Carrollian limit of Einstein gravity defined through the Hamiltonian formalism and the Carrollian theory of gravity def…
Asymptotic structure of Carrollian limits of Einstein-Yang-Mills theory in four spacetime dimensions
Oscar Fuentealba, Marc Henneaux, Patricio Salgado-Rebolledo +1
In this paper, three things are done. First, we study from an algebraic point of view the infinite-dimensional BMS-like extensions of the Carroll algebra relevant to the asymptotic…
Noncommutativity and Physics: A non-technical review
Ali H. Chamseddine, Alain Connes, Walter D. van Suijlekom
We give an overview of the applications of noncommutative geometry to physics. Our focus is entirely on the conceptual ideas, rather than on the underlying technicalities. Starting…