462 citations · 1.2k across the 9 of their papers we have counts for
9 papers
Complete Set of Homogeneous Isotropic Analytic Solutions in Scalar-Tensor Cosmology with Radiation and Curvature
Itzhak Bars, Shih-Hung Chen, Paul J. Steinhardt +1
We study a model of a scalar field minimally coupled to gravity, with a specific potential energy for the scalar field, and include curvature and radiation as two additional parame…
Antigravity and the big crunch/big bang transition
Itzhak Bars, Shih-Hung Chen, Paul J. Steinhardt +1
We point out a new phenomenon which seems to be generic in 4d effective theories of scalar fields coupled to Einstein gravity, when applied to cosmology. A lift of such theories to…
Geodesically Complete Analytic Solutions for a Cyclic Universe
Itzhak Bars, Shih-Hung Chen, Neil Turok
We present analytic solutions to a class of cosmological models described by a canonical scalar field minimally coupled to gravity and experiencing self interactions through a hype…
Matter Bounce Cosmology with the f(T) Gravity
Yi-Fu Cai, Shih-Hung Chen, James B. Dent +2
We show that the f(T) gravitational paradigm, in which gravity is described by an arbitrary function of the torsion scalar, can provide a mechanism for realizing bouncing cosmologi…
A new approach to the vacuum of inflationary models
Shih-Hung Chen, James B. Dent
A new approach is given for the implementation of boundary conditions used in solving the Mukhanov-Sasaki equation in the context of inflation. The familiar quantization procedure…
Cosmological perturbations in f(T) gravity
Shih-Hung Chen, James B. Dent, Sourish Dutta +1
We investigate the cosmological perturbations in f(T) gravity. Examining the pure gravitational perturbations in the scalar sector using a diagonal vierbien, we extract the corresp…