A bstract Relaxing the Bondi gauge, the solution space of three-dimensional gravity in the
metric formulation has been shown to contain an additional free function that promotes the …

A bstract The conformal symmetry algebra in 2D (Diff (S 1)⊕ Diff (S 1)) is shown to be
related to its ultra/non-relativistic version (BMS 3≈ GCA 2) through a nonlinear map of the …

A bstract We investigate two dimensional (2d) quantum field theories which exhibit Non-
Lorentzian Kač-Moody (NLKM) algebras as their underlying symmetry. Our investigations …

A bstract In this paper we perform the Hamiltonian reduction of the action for three-
dimensional Einstein gravity with vanishing cosmological constant using the Chern-Simons …

These notes are an introduction to asymptotic symmetries in gauge theories, with a focus on
general relativity in four dimensions. We explain how to impose consistent sets of boundary …

A bstract We consider a non-relativistic (NR) limit of (2+ 1)-dimensional Maxwell Chern-
Simons (CS) gravity with gauge algebra [Maxwell]⊕ u (1)⊕ u (1). We obtain a finite NR CS …

The Bondi-Metzner-Sachs-van der Burg (BMS) group is the asymptotic symmetry group of
radiating asymptotically flat spacetimes. It has recently received renewed interest in the …

A bstract The asymptotically flat structure of\(\mathcal {N}=\left (2, 0\right)\) supergravity in
three spacetime dimensions is explored. The asymptotic symmetries are found to be …

We investigate quantum field theories in two dimensions (2D) with an underlying Bondi–van
der Burgh–Metzner-Sachs symmetry augmented by u (1) currents. These field theories are …

The conformal extension of the BMS 3 algebra is constructed. Apart from an infinite number
of “superdilatations,” in order to incorporate superspecial conformal transformations, the …