Canonical realization of (2+1)-dimensional Bondi-Metzner-Sachs symmetry

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Title:	Canonical realization of (2+1)-dimensional Bondi-Metzner-Sachs symmetry
Author:	Batlle Arnau, Carles; Campello, Víctor; Gomis Torné, Joaquin
Other authors:	Universitat Politècnica de Catalunya. Departament de Matemàtiques; Universitat Politècnica de Catalunya. ACES - Control Avançat de Sistemes d'Energia
Abstract:	We construct canonical realizations of the (2+1)-dimensional Bondi-Metzner-Sachs (bms3) algebra as symmetry algebras of a free Klein-Gordon (KG) field in 2+1 dimensions for both massive and massless cases. We consider two types of realizations, one on shell, written in terms of the Fourier modes of the scalar field, and the other off shell, with nonlocal transformations written in terms of the KG field and its momenta. These realizations contain both supertranslations and superrotations, for which we construct the corresponding Noether charges.
Subject(s):	-Àrees temàtiques de la UPC::Matemàtiques i estadística::Àlgebra -Algebra -Functions of complex variables -Funcions de variables complexes -Àlgebra
Rights:	Attribution-NonCommercial-NoDerivs 3.0 Spain http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Document type:	Article - Submitted version Article
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