415 citations · 3.1k across the 94 of their papers we have counts for
7 papers · 1 filter
Virialization in Dark Energy Cosmology
Peng Wang
We discuss the issue of energy nonconservation in the virialzation process of spherical collapse model with homogeneous dark energy. We propose an approximation scheme to find the…
Can vacuum decay in our Universe?
Peng Wang, Xin-He Meng
We take a phenomenological approach to study the cosmological evolution of decaying vacuum cosmology (CDM) based on a simple assumption about the form of the modified matter…
Cosmological dynamics of D-cceleration
Xin-He Meng, Peng Wang
We study the cosmological dynamics of an effective theory for a strongly coupled scalar field in the moduli space of supersymmetric Yang-Mills theory recently propo…
Palatini formulation of L(R) gravity
Peng Wang, Xin-He Meng
We review the Palatini formulation of the higher-derivative gravity of the form and its applications in cosmology.
Modified Friedmann Equations in R-Modified Gravity
Xinhe Meng, Peng Wang
Recently, corrections to Einstein-Hilbert action that become important at small curvature are proposed. We discuss the first order and second order approximations to the field equa…
Palatini formulation of modified gravity with squared scalar curvature
Xinhe Meng, Peng Wang
In this paper we derive the Modified Friedmann equation in the Palatini formulation of gravity. Then we use it to discuss the problem of whether in Palatini formulation a $R^…