Article (Scientific journals)
Ambient-space variational calculus for gauge fields on constant-curvature spacetimes
Bekaert, Xavier; BOULANGER, Nicolas; Goncharov, Yegor et al.
2024In Journal of Mathematical Physics, 65 (4)
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Keywords :
variational calculus; BRST symmetry; higher-spin fields; variational bi-complex
Abstract :
[en] We propose a systematic generating procedure to construct free Lagrangians for massive, massless and partially massless, totally-symmetric tensor fields on AdSd+1 starting from the Becchi–Rouet–Stora–Tyutin (BRST) Lagrangian description of massless fields in the flat ambient space Rd,2. A novelty is that the Lagrangian is described by a d + 1 form on Rd,2 whose pullback to AdSd+1 gives the genuine Lagrangian defined on anti de Sitter spacetime. Our derivation uses the triplet formulation originating from the first-quantized BRST approach, where the action principle is determined by the BRST operator and the inner product of a first-quantised system. In this way we build, in a manifestly so(2, d)-covariant manner, a unifying action principle for the three types of fields mentioned above. In particular, our derivation justifies the form of some actions proposed earlier for massive and massless fields on (anti)-de Sitter. We also give a general setup for ambient Lagrangians in terms of the respective jet-bundles and variational bi-complexes. In particular we introduce a suitable ambient-space Euler–Lagrange differential which allows one to derive the equations of motion ambiently, i.e., without the need to explicitly derive the respective spacetime Lagrangian.
Research center :
AGIF - Algèbre, Géométrie et Interactions fondamentales
Disciplines :
Physics
Mathematics
Author, co-author :
Bekaert, Xavier;  Institut Denis Poisson, Unité Mixte de Recherche 7013, CNRS, Université de Tours, Université d’Orléans 1 , Parc de Grandmont, 37200 Tours, France
BOULANGER, Nicolas  ;  Université de Mons - UMONS > Faculté des Sciences > Service de Physique de l'Univers, Champs et Gravitation
Goncharov, Yegor ;  Université de Mons - UMONS > Faculté des Sciences > Service de Physique de l'Univers, Champs et Gravitation ; Institut Denis Poisson, Unité Mixte de Recherche 7013, CNRS, Université de Tours, Université d’Orléans 1 , Parc de Grandmont, 37200 Tours, France
Grigoriev, Maxim ;  Université de Mons - UMONS > Faculté des Sciences > Service de Physique de l'Univers, Champs et Gravitation ; I.E. Tamm Department of Theoretical Physics, P.N. Lebedev Physical Institute 3 , Leninsky Ave. 53, 119991 Moscow, Russia
Language :
English
Title :
Ambient-space variational calculus for gauge fields on constant-curvature spacetimes
Publication date :
01 April 2024
Journal title :
Journal of Mathematical Physics
ISSN :
0022-2488
eISSN :
1089-7658
Publisher :
AIP Publishing
Volume :
65
Issue :
4
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
S827 - Physique de l'Univers, Champs et Gravitation
Research institute :
R150 - Institut de Recherche sur les Systèmes Complexes
Funders :
Fonds de la Recherche Scientifique–FNRS
Data Set :
Available on ORBi UMONS :
since 27 April 2024

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