33 citations · 92 across the 5 of their papers we have counts for
5 papers
New Inflation in the Landscape and Typicality of the Observed Cosmic Perturbation
Chien-I Chiang, Keisuke Harigaya
We investigate if the observed small and nearly scale-invariant primordial cosmic perturbation, i.e. the perturbation amplitude and the spectral index $n_s \simeq…
What does Inflation say about Dark Energy given the Swampland Conjectures?
Chien-I Chiang, Jacob M. Leedom, Hitoshi Murayama
We discuss the relations between swampland conjectures and observational constraints on both inflation and dark energy. Using the requirement , with as a un…
Building Supergravity Quintessence Model
Chien-I Chiang, Hitoshi Murayama
It was recently pointed out that the cosmological constant (even metastable one) belongs to the so-called "swampland" and hence cannot be obtained as the low-energy limit of string…
Spherically symmetric analysis on open FLRW solution in non-linear massive gravity
Chien-I Chiang, Keisuke Izumi, Pisin Chen
We study non-linear massive gravity in the spherically symmetric context. Our main motivation is to investigate the effect of helicity-0 mode which remains elusive after analysis o…
Constraining the Detailed Balance Condition in Horava Gravity with Cosmic Accelerating Expansion
Chien-I Chiang, Je-An Gu, Pisin Chen
In 2009 Hořava proposed a power-counting renormalizable quantum gravity theory. Afterwards a term in the action that softly violates the detailed balance condition has been conside…