2024-03-29T06:46:24Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/600652016-02-17T11:37:18Zcom_10261_14181com_10261_4col_10261_14182
Axion phantom energy
González-Díaz, Pedro F.
The existence of phantom energy in a universe which evolves to eventually show a big rip doomsday is a possibility which is not excluded by present observational constraints. In this paper it is argued that the field theory associated with a simple quintessence model is compatible with a field definition that is interpretable in terms of a rank-3 axionic tensor field, whenever we consider a perfect-fluid equation of state that corresponds to the phantom energy regime. Explicit expressions for the axionic field and its potential, both in terms of an imaginary scalar field, are derived, which show that these quantities both diverge at the big rip, and that the onset of phantom-energy dominance must take place just at present. © 2004 The American Physical Society.
The author thanks Carmen L. Sigu¨enza for useful discussions. This work was supported by DGICYT under Research Project BMF2002-03758.
Peer Reviewed
2012-11-13T10:08:13Z
2012-11-13T10:08:13Z
2004
2012-11-13T10:08:13Z
artículo
http://purl.org/coar/resource_type/c_6501
doi: 10.1103/PhysRevD.69.063522
issn: 0556-2821
Physical Review D - Particles, Fields, Gravitation and Cosmology 69: 063522 (2004)
http://hdl.handle.net/10261/60065
10.1103/PhysRevD.69.063522
en
open
American Physical Society