Post-Newtonian parameters and of scalar-tensor gravity with a general potential

M Hohmann, L Järv, P Kuusk, E Randla - Physical Review D—Particles, Fields …, 2013 - APS
We calculate the parametrized post-Newtonian parameters γ and β for scalar-tensor gravity
with a generic coupling function ω and scalar potential V in the Jordan conformal frame in …

Global portraits of nonminimal inflation: Metric and Palatini formalism

L Järv, S Karamitsos, M Saal - Physical Review D, 2024 - APS
In this paper, we study the global phase space dynamics of single nonminimally coupled
scalar field inflation models in the metric and Palatini formalisms. Working in the Jordan …

Global Portraits of Nonminimal Inflation: Metric and Palatini

L Järv, S Karamitsos, M Saal - arxiv preprint arxiv:2401.12314, 2024 - arxiv.org
In this paper, we study the global phase space dynamics of single nonminimally coupled
scalar field inflation models in the metric and Palatini formalisms. Working in the Jordan …

Quintessence in the Weyl-Gauss-Bonnet model

JJT Díaz, K Dimopoulos, M Karčiauskas… - Journal of Cosmology …, 2024 - iopscience.iop.org
Quintessence models have been widely examined in the context of scalar-Gauss-Bonnet
gravity, a subclass of Horndeski's theory, and were proposed as viable candidates for Dark …

From inflation to dark energy in scalar-tensor cosmology

J Dutta, L Jarv, W Khyllep, S Tokke - arxiv preprint arxiv:2007.06601, 2020 - arxiv.org
The methods of dynamical systems have found wide applications in cosmology, with focus
either upon inflation or upon the passage into dark energy era. In this paper, we endeavor to …

Scalar-tensor cosmologies with dust matter in the general relativity limit

L Järv, P Kuusk, M Saal - Physical Review D—Particles, Fields, Gravitation …, 2012 - APS
We consider flat Friedmann-Lemaître-Robertson-Walker cosmological models in the
framework of general scalar-tensor theories of gravity with arbitrary coupling functions, set in …

Aspectos de gravedad modificada en el universo temprano y tardío

JJ Terente Díaz - 2024 - docta.ucm.es
“Si el suelo se inclina (las cosas se complican), uno aprieta los puños y los músculos y tira
hacia arriba porque la gran mayoría de las veces nos espera una cumbre que conquistar y …

Examples of cosmological rips in the scalar-tensor cosmology

M Saal, A Frantskjavitšius - Journal of Physics: Conference …, 2014 - iopscience.iop.org
Plenitude of models incorporating a dynamical dark energy equation of state are proposed
and the scalar-tensor gravity is certainly one possible candidate. In this paper we examine …

Parametric instability in scalar gravitational fields

TB Davies, CHT Wang, R Bingham… - … Physics Letters A, 2012 - World Scientific
We present a brief review on a new dynamical mechanism for a strong field effect in scalar–
tensor theory. Starting with a summary of the essential features of the theory and subsequent …

[PDF][PDF] FACULTAD DE CIENCIAS FÍSICAS

ADEGMEN EL, HT HUARACHE, OR JORGE - 2024 - inspirehep.net
“Si el suelo se inclina (las cosas se complican), uno aprieta los puños y los músculos y tira
hacia arriba porque la gran mayoría de las veces nos espera una cumbre que conquistar y …