Asymptotic symmetries of three-dimensional Chern-Simons gravity for the Maxwell algebra

Understand

We study a three-dimensional Chern-Simons gravity theory based on the Maxwell algebra.

• We find that the boundary dynamics is described by an enlargement and deformation of the $\mathfrak{bms}_3$ algebra with three independent central charges.
• This symmetry arises from a gravity action invariant under the local Maxwell group and is characterized by presence of Abelian generators which modify the commutation relations of the super-translations in the standard $\mathfrak{bms}_3$ algebra.
• Our analysis is based on the charge algebra of the theory in the BMS gauge, which includes the known solutions of standard asymptotically flat case.