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MODIFIED-GRAVITY THEORIES WITH NONDYNAMICAL BACKGROUND FIELDS

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dc.creatorCARLOS MARAT REYES MARTÍNEZ
dc.date2022
dc.date.accessioned2025-01-10T15:34:16Z
dc.date.available2025-01-10T15:34:16Z
dc.date.issued2022
dc.description.abstractWE STUDY THE DYNAMICS OF A MODIFIED-GRAVITY THEORY, WHICH IS SUPPLEMENTED BY AN EXTENDED GIBBONSHAWKING-YORK BOUNDARY TERM AND INCORPORATES DIFFEOMORPHISM VIOLATION THROUGH NONDYNAMICAL BACKGROUND FIELDS DENOTED AS U AND S?? IN THE LITERATURE. AN ADM DECOMPOSITION ALLOWS US TO PROJECT THE MODIFIED EINSTEIN EQUATIONS INTO PURELY SPACELIKE HYPERSURFACES, WHICH IMPLIES THE FIELD EQUATIONS FOR THE INDUCED DYNAMICAL THREE-METRIC. WE ALSO OBTAIN THE HAMILTON-JACOBI EQUATIONS OF MOTION FOR THE CANONICAL VARIABLES OF THE THEORY BASED ON ITS HAMILTONIAN, WHICH WAS DERIVED IN A PREVIOUS WORK. THE COMPUTATIONS SHOW THAT THE DYNAMICAL FIELD EQUATIONS OBTAINED FROM THE LAGRANGIAN AND HAMILTONIAN APPROACHES ARE CONSISTENT WITH EACH OTHER. CONNECTIONS TO BRANS-DICKE THEORY AND GHOST-FREE MASSIVE GRAVITY ARE ESTABLISHED.
dc.formatapplication/pdf
dc.identifier.doi10.1103/PhysRevD.106.044050
dc.identifier.issn2470-0029
dc.identifier.issn2470-0010
dc.identifier.issn1550-2368
dc.identifier.issn1550-7998
dc.identifier.urihttps://repositorio.ubiobio.cl/handle/123456789/12640
dc.languagespa
dc.publisherPHYSICAL REVIEW D
dc.relation.uri10.1103/PhysRevD.106.044050
dc.rightsPUBLICADA
dc.titleMODIFIED-GRAVITY THEORIES WITH NONDYNAMICAL BACKGROUND FIELDS
dc.typeARTÍCULO
dspace.entity.typePublication
ubb.EstadoPUBLICADA
ubb.Otra ReparticionDEPARTAMENTO DE CIENCIAS BASICAS
ubb.SedeCHILLÁN
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