10 citations · 10 across the 1 of their papers we have counts for
6 papers
GGI lectures on boundary and asymptotic symmetries
Simone Speziale
Support material for lectures at the May '25 Galileo Galilei Institute school on asymptotic symmetries and flat holography. Contains an introduction to Noether theorem for gauge th…
Spatially local energy density of gravitational waves
Antoine Rignon-Bret, Simone Speziale
We propose a new set of BMS charges at null infinity, characterized by a super-translation flux that contains only the `hard' term. This is achieved with a specific corner improvem…
Center-less BMS charge algebra
Antoine Rignon-Bret, Simone Speziale
We show that when the Wald-Zoupas prescription is implemented, the resulting charges realize the BMS symmetry algebra without any 2-cocycle nor central extension, at any cut of fut…
General covariance and boundary symmetry algebras
Antoine Rignon-Bret, Simone Speziale
In general relativity as well as gauge theories, non-trivial symmetries can appear at boundaries. In the presence of radiation some of the symmetries are not Hamiltonian vector fie…
Lessons from discrete light-cone quantization for physics at null infinity: Bosons in two dimensions
Glenn Barnich, Sucheta Majumdar, Simone Speziale +1
Motivated by issues in the context of asymptotically flat spacetimes at null infinity, we discuss in the simplest example of a massless scalar field in two dimensions several subtl…
Spinfoams: Foundations
Jonathan Engle, Simone Speziale
Spinfoams provide a framework for the dynamics of loop quantum gravity that is manifestly covariant under the full four-dimensional diffeomorphism symmetry group of general relativ…