7 papers
Lectures on Carrollian Holography
Kevin Nguyen
Carrollian Holography aims to provide a holographic description of quantum gravity in asymptotically flat spacetimes, in terms of a novel kind of `carrollian' conformal field theor…
Bounds on Lorentz invariance violation from muon fluctuations at the Pierre Auger Observatory
The Pierre Auger Collaboration, A. Abdul Halim, P. Abreu +357
Quantum gravity theories often modify spacetime symmetries. In particular, Lorentz invariance may be violated when approaching the Planck scale. Although the scales at which intera…
Operator Product Expansion in Carrollian CFT
Kevin Nguyen, Jakob Salzer
Carrollian conformal field theory offers an alternative description of massless scattering amplitudes, that is holographic in nature. In an effort to build a framework that is both…
Hydrodynamics of two-dimensional CFTs
Kevin Nguyen
We demonstrate that the geometric action on a coadjoint orbit of the Virasoro group appropriately describes non-dissipative two-dimensional conformal fluids. While this action had…
Soft theorems and spontaneous symmetry breaking
Shreyansh Agrawal, Kevin Nguyen
The soft photon and soft graviton theorems of Weinberg are known to derive from conservation laws associated with asymptotic symmetries. Within the corresponding classical theories…
Celestial decomposition of Wigner's particles
Lorenzo Iacobacci, Kevin Nguyen
We provide a detailed decomposition of Wigner's particles, defined as unitary irreducible representations of the Poincaré group, in terms of unitary representations of its Lorentz…