115 citations · 1.2k across the 38 of their papers we have counts for
7 papers · 1 filter
Testing dark energy models with data
Jing-Zhao Qi, Ming-Jian Zhang, Wen-Biao Liu
is a diagnostic approach to distinguish dark energy models. However, there are few articles to discuss what is the distinguishing criterion. In this paper, firstly we smoot…
Several parametrization dark energy models comparison with Statefinder hierarchy
Jing-Zhao Qi, Wen-Biao Liu
We employ the Statefinder hierarchy and the growth rate of matter perturbations to explore the discrimination of CDM and some parametrization dark energy models including the Ch…
Dynamical evolution of quintessence cosmology in a physical phase space
Jing-Zhao Qi, Ming-Jian Zhang, Wen-Biao Liu
The phase space analysis of cosmological parameters and is given. Based on this, the well-known quintessence cosmology is studied with an exponential potential $V(ϕ)=V_…
Observational constraint on the varying speed of light theory
Jing-Zhao Qi, Ming-Jian Zhang, Wen-Biao Liu
The varying speed of light (VSL) theory is controversial. It succeeds in explaining some cosmological problems, but on the other hand it is excluded by mainstream physics because i…
Transient acceleration in gravity
Jing-Zhao Qi, Rong-Jia Yang, Ming-Jian Zhang +1
Recently a gravity based on the modification of the teleparallel gravity was proposed to explain the accelerated expansion of the universe without the need of dark energy. W…
The evolution of the power law k-essence cosmology
Rong-Jia Yang, Bohai Chen, Jun Li +1
We investigate the evolution of the power law k-essence field in FRWL spacetime. The autonomous dynamical system and critical points are obtained. The corresponding cosmological pa…