63 citations · 313 across the 21 of their papers we have counts for
7 papers · 1 filter
Virasoro blocks and the reparametrization formalism
Kevin Nguyen
An effective theory designed to compute Virasoro identity blocks at large central charge, expressed in terms of the propagation of a reparametrization/shadow mode between bilocal v…
Geometric action for extended Bondi-Metzner-Sachs group in four dimensions
Glenn Barnich, Kevin Nguyen, Romain Ruzziconi
The constrained Hamiltonian analysis of geometric actions is worked out before applying the construction to the extended Bondi-Metzner-Sachs group in four dimensions. For any Hamil…
Universal derivation of the asymptotic charges of bosonic massless particles
Kevin Nguyen, Peter West
We present a unified treatment of the conserved asymptotic charges associated with any bosonic massless particle in any spacetime dimension. In particular we provide master formula…
Conserved asymptotic charges for any massless particle
Kevin Nguyen, Peter West
We compute the conserved charges associated with the asymptotic symmetries of massless particles by examining their free theory in Minkowski spacetime. We give a procedure to syste…
Loop-corrected subleading soft theorem and the celestial stress-tensor
Laura Donnay, Kevin Nguyen, Romain Ruzziconi
We demonstrate that the one-loop exact subleading soft graviton theorem automatically follows from conservation of the BMS charges, provided that the hard and soft fluxes separatel…
Charge and Antipodal Matching across Spatial Infinity
Federico Capone, Kevin Nguyen, Enrico Parisini
We derive the antipodal matching relations used to demonstrate the equivalence between soft graviton theorems and BMS charge conservation across spatial infinity. To this end we pr…
Schwarzian transformations at null infinity
Kevin Nguyen
I describe the Schwarzian behavior of the gravitational field at null infinity under superrotations, to be understood as an \textit{unobservable} gauge artifact. To this end I revi…