Year: 2025
Type: article
Abstract: A bstract An enhanced version of the conformal BMS 3 algebra is presented. It is shown to emerge from the asymptotic structure of an extension of conformal gravity in 3D by Pope and Townsend that consistently accommodates an additional spin-2 field, once it is endowed with a suitable set of boundary conditions. The canonical generators of the asymptotic symmetries then span a precise nonlinear W (2 , 2 , 2 , 2 , 1 , 1 , 1) algebra, whose central extensions and coefficients of the nonlinear terms are completely determined by the central charge of the Virasoro subalgebra. The wedge algebra corresponds to the conformal group in four dimensions SO(4, 2) and therefore, enhanced conformal BMS 3 can also be regarded as an infinite-dimensional nonlinear extension of the AdS 5 algebra with nontrivial central extensions. It is worth mentioning that our boundary conditions might be considered as a starting point in order to consistently incorporate either a finite or an infinite number of conformal higher spin fields.
Source: Journal of High Energy Physics
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Awards: Gravity and higher spin theory, Higher Spin Gravity and Holography, ASYMPTOTIC STRUCTURE OF SPACETIMES AND INTEGRABLE DEFORMATIONS IN DUAL FIELD THEORIES, G5287957487, GRAVITATIONAL DUALS OF CONFORMAL FIELD THEORIES IN 2D DEFORMATIONS AVERAGING AND GENERALIZED GIBBS ENSEMBLES, ASYMPTOTIC STRUCTURE OF SPACETIME AND GRAVITATIONAL RADIATION IN THE PRESENCE OF A POSITIVE COSMOLOGICAL CONSTANT
OpenAlex ID: W4409343147