804 citations · 1.2k across the 7 of their papers we have counts for
7 papers
Observational Constraints on Variable Chaplygin Gas
Zong-Kuan Guo, Yuan-Zhong Zhang
We investigate observational constraints on the variable Chaplygin gas model from the gold sample of type Ia supernova data and the recent measurements of the X-ray gas mass fracti…
Cosmological Evolution of Interacting Phantom Energy with Dark Matter
Zong-Kuan Guo, Rong-Gen Cai, Yuan-Zhong Zhang
We investigate the cosmological evolution of an interacting phantom energy model in which the phantom field has interaction with the dark matter. We discuss the existence and stabi…
Interacting Phantom Energy
Zong-Kuan Guo, Yuan-Zhong Zhang
We investigate the role of a suitable interaction between a matter fluid and a phantom field for the coincidence problem. There exists a stationary scaling solution which is a stab…
Cosmological Evolution of a Quintom Model of Dark Energy
Zong-Kuan Guo, Yun-Song Piao, Xinmin Zhang +1
We investigate in this paper the cosmological evolution of a dark energy model with two scalar fields where one of the scalar has canonical kinetic energy and another scalar has ne…
Cosmological Scaling Solutions of Multiple Tachyon Fields with Inverse Square Potentials
Zong-Kuan Guo, Yuan-Zhong Zhang
We investigate cosmological dynamics of multiple tachyon fields with inverse square potentials. A phase-space analysis of the spatially flat FRW models shows that there exists powe…
Cosmological Scaling Solutions and Cross-coupling Exponential Potential
Zong-Kuan Guo, Yun-Song Piao, Rong-Gen Cai +1
We present a phase-space analysis of cosmology containing multiple scalar fields with a positive or negative cross-coupling exponential potential. We show that there exist power-la…