298 citations · 958 across the 8 of their papers we have counts for
9 papers
Revisiting chameleon gravity - thin-shells and no-shells with appropriate boundary conditions
Takashi Tamaki, Shinji Tsujikawa
We derive analytic solutions of a chameleon scalar field that couples to a non-relativistic matter in the weak gravitational background of a spherically symmetric body, paying…
Constraints on scalar-tensor models of dark energy from observational and local gravity tests
Shinji Tsujikawa, Kotub Uddin, Shuntaro Mizuno +2
We construct a family of viable scalar-tensor models of dark energy (DE) which possess a phase of late-time acceleration preceded by a standard matter era, while at the same time s…
Solar system and equivalence principle constraints on f(R) gravity by chameleon approach
Salvatore Capozziello, Shinji Tsujikawa
We study constraints on f(R) dark energy models from solar system experiments combined with experiments on the violation of equivalence principle. When the mass of an equivalent sc…
Density perturbations in f(R) gravity theories in metric and Palatini formalisms
Shinji Tsujikawa, Kotub Uddin, Reza Tavakol
We make a detailed study of matter density perturbations in both metric and Palatini formalisms in theories whose Lagrangian density is a general function, f(R), of the Ricci scala…
UV stable, Lorentz-violating dark energy with transient phantom era
Maxim Libanov, Eleftherios Papantonopoulos, Valery Rubakov +2
Phantom fields with negative kinetic energy are often plagued by the vacuum quantum instability in the ultraviolet region. We present a Lorentz-violating dark energy model free fro…
f(R) gravity theories in Palatini formalism: cosmological dynamics and observational constraints
Stephane Fay, Reza Tavakol, Shinji Tsujikawa
We make a systematic study of the cosmological dynamics for a number of f(R) gravity theories in Palatini formalism. We find a number of interesting results: (i) models based on th…