TY - JOUR
T1 - Brans-Dicke cosmology does not have the ΛcDM phase as a universal attractor
AU - García-Salcedo, Ricardo
AU - González, Tame
AU - Quiros, Israel
N1 - Publisher Copyright:
© 2015 American Physical Society.
PY - 2015/12/23
Y1 - 2015/12/23
N2 - In this paper we seek for relevant information on the asymptotic cosmological dynamics of the Brans-Dicke theory of gravity for several self-interaction potentials. By means of the simplest tools of the dynamical systems theory, it is shown that the general relativity de Sitter solution is an attractor of the Jordan frame (dilatonic) Brans-Dicke theory only for the exponential potential U(φ)expφ, which corresponds to the quadratic potential V(φ)φ2 in terms of the original Brans-Dicke field φ=expφ, or for potentials which approach to expφ at the stable point. At the de Sitter attractor, as well as at the stiff-matter equilibrium configurations, the dilaton is necessarily massless. We find bounds on the Brans-Dicke coupling constant ωBD, which are consistent with well-known results.
AB - In this paper we seek for relevant information on the asymptotic cosmological dynamics of the Brans-Dicke theory of gravity for several self-interaction potentials. By means of the simplest tools of the dynamical systems theory, it is shown that the general relativity de Sitter solution is an attractor of the Jordan frame (dilatonic) Brans-Dicke theory only for the exponential potential U(φ)expφ, which corresponds to the quadratic potential V(φ)φ2 in terms of the original Brans-Dicke field φ=expφ, or for potentials which approach to expφ at the stable point. At the de Sitter attractor, as well as at the stiff-matter equilibrium configurations, the dilaton is necessarily massless. We find bounds on the Brans-Dicke coupling constant ωBD, which are consistent with well-known results.
UR - http://www.scopus.com/inward/record.url?scp=84953233721&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.92.124056
DO - 10.1103/PhysRevD.92.124056
M3 - Artículo
SN - 1550-7998
VL - 92
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 12
M1 - 124056
ER -