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Título

Varying electric charge in multiscale spacetimes

Autor Calcagni, Gianluca ; Magueijo, J.; Rodríguez Fernández, David
Fecha de publicación 2014
EditorAmerican Physical Society
Citación Physical Review D - Particles, Fields, Gravitation and Cosmology 89: 024021 (2014)
ResumenWe derive the covariant equations of motion for Maxwell field theory and electrodynamics in multiscale spacetimes with weighted Laplacian. An effective spacetime-dependent electric charge of geometric origin naturally emerges from the theory, thus giving rise to a varying fine-structure constant. The theory is compared with other varying-coupling models, such as those with a varying electric charge or varying speed of light. The theory is also confronted with cosmological observations, which can place constraints on the characteristic scales in the multifractional measure. We note that the model considered here is fundamentally different from those previously proposed in the literature, either of the varying-e or varying-c persuasion. © 2014 American Physical Society.
Descripción 15 pags. ; PACS numbers: 04.60.-m, 11.10.Kk
URI http://hdl.handle.net/10261/110748
DOI10.1103/PhysRevD.89.024021
Identificadoresdoi: 10.1103/PhysRevD.89.024021
issn: 1550-7998
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