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dc.contributor.author
Ferraro, Rafael  
dc.contributor.author
Guzmán Monsalve, María José  
dc.date.available
2019-10-22T18:11:56Z  
dc.date.issued
2018-12  
dc.identifier.citation
Ferraro, Rafael; Guzmán Monsalve, María José; Quest for the extra degree of freedom in f ( T ) gravity; American Physical Society; Physical Review D: Particles, Fields, Gravitation and Cosmology; 98; 12; 12-2018  
dc.identifier.issn
2470-0010  
dc.identifier.uri
http://hdl.handle.net/11336/86943  
dc.description.abstract
It has recently been shown that f(T) gravity has n(n−3)/2+1 physical degrees of freedom (d.o.f.) in n dimensions, contrary to previous claims. The simplest physical interpretation of this fact is that the theory possesses a scalar d.o.f. This is the case of f(R) gravity, a theory that can be understood in the Einstein frame as general relativity plus a scalaron. The scalar field that represents the extra d.o.f. in f(T) gravity encodes information about the parallelization of the spacetime, which is detected through a reinterpretation of the equations of motion in both the teleparallel Jordan and Einstein frames. The trace of the equations of motion in f(T) gravity shows the propagation of the scalar d.o.f., giving an accurate proof of its existence. We also provide a simple toy model of a physical system with rotational pseudoinvariance, like f(T) gravity, which gives insights into the physical interpretation of the extra d.o.f. We discuss some implications and unusual features of the previously worked out Hamiltonian formalism for f(T) gravity. Finally we show some mathematical tools to implement the Hamiltonian formulation in the Einstein frame of f(T) gravity, which exhibits some problems that should be addressed in future works.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
American Physical Society  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
TELEPARALLEL GRAVITY  
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F(T) GRAVITY  
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SCALAR FIELD  
dc.subject.classification
Física de Partículas y Campos  
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Ciencias Físicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Quest for the extra degree of freedom in f ( T ) gravity  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2019-10-17T19:10:36Z  
dc.journal.volume
98  
dc.journal.number
12  
dc.journal.pais
Estados Unidos  
dc.journal.ciudad
New York  
dc.description.fil
Fil: Ferraro, Rafael. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina  
dc.description.fil
Fil: Guzmán Monsalve, María José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina  
dc.journal.title
Physical Review D: Particles, Fields, Gravitation and Cosmology  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1103/PhysRevD.98.124037  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.aps.org/doi/10.1103/PhysRevD.98.124037