141 citations · 964 across the 18 of their papers we have counts for
18 papers
Cosmological dynamics of scalar fields with O(N) symmetry
Jian-gang Hao, Xin-zhou Li
In this paper, we study the cosmological dynamics of scalar fields with O(N) symmetry in general potentials. We compare the phase space of the dynamical systems of the quintessence…
Phantom-like GCG and the constraints of its parameters via cosmological dynamics
Jian-gang Hao, Xin-zhou Li
We extend the equation of state of GCG (Generalized Chaplygin Gas) to regime and show, from the point of view of dynamics, that the parameters of GCG should be in the range…
Phantom Cosmic Dynamics: Tracking Attractor and Cosmic Doomsday
Jian-gang Hao, Xin-zhou Li
We study the dynamics of phantom model and give the conditions for potentials to admit tracking attractor, de Sitter attractor and big rip attractor. Especially, we show that phant…
On the Quintessence with Abelian and Non-abelian Symmetry
Xin-zhou Li, Jian-gang Hao, Dao-jun Liu +1
We study the perturbations on both "radial" and "angular" components of the quintessence with an internal abelian and non-abelian symmetry. The properties of the perturbation on th…
Kantowski-Sachs universe cannot be closed
Xin-zhou Li, Jian-gang Hao
In this paper, by analyzing the instability against spatially homogeneous and anisotropic perturbations of the Kantowski-Sachs-type during different cosmological epoch, we show tha…
Phantom with Born-Infield type Lagrangian
Jian-gang Hao, Xin-zhou Li
Recent analysis of the observation data indicates that the equation of state of the dark energy might be smaller than -1, which leads to the introduction of phantom models featured…