83 citations · 1.1k across the 41 of their papers we have counts for
10 papers · 1 filter
Revisiting the parametrization of Equation of State of Dark Energy via SNIa Data
Dao-Jun Liu, Xin-Zhou Li, Jiangang Hao +1
In this paper, we revisit the parameterizations of the equation of state of dark energy and point out that comparing merely the of different fittings may not be optimal for c…
Statefinder Diagnostic for Quintessence with or without Thermal Interaction
Wei-Zhong Liu, Dao-Jun Liu
The cosmological dynamics of minimally coupled scalar field that couples to the background matter with thermal interactions is investigated by using statefinder diagnostics. The ti…
Statefinder diagnostic for cosmology with the abnormally weighting energy hypothesis
Dao-Jun Liu, Wei-Zhong Liu
In this paper, we apply the statefinder diagnostic to the cosmology with the Abnormally Weighting Energy hypothesis (AWE cosmology), in which dark energy in the observational (ordi…
Solar System tests disfavor gravities
Xing-hua Jin, Dao-jun Liu, Xin-zhou Li
Using the elegant method employed recently by Erickcek, Smith and Kamionkowski, on the premise that the space-time of Solar System is described by a metric with constant-curvature…
Exponential Cardassian Universe
Dao-jun Liu, Chang-bo Sun, Xin-zhou Li
The expectation of explaining cosmological observations without requiring new energy sources is forsooth worthy of investigation. In this letter, a new kind of Cardassian models, c…
Dynamics of Quintessence with Thermal Interactions
Dao-jun Liu, Xin-zhou Li
The cosmological dynamics of minimally coupled scalar field that couple to the background matter with thermal interactions is investigated in exponential potential. The conditions…
CMBR Constraint on a Modified Chaplygin Gas Model
Dao-jun Liu, Xin-zhou Li
In this paper, a modified Chaplygin gas model of unifying dark energy and dark matter with exotic equation of state which can also explain the recent accelerat…
Cosmological perturbations and noncommutative tachyon inflation
Dao-jun Liu, Xin-zhou Li
The motivation for studying the rolling tachyon and non-commutative inflation comes from string theory. In the tachyon inflation scenario, metric perturbations are created by tachy…
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…
O(N) quintessence
Xin-zhou Li, Jian-gang Hao, Dao-jun Liu
We study a new class of quintessence models, in which the scalar field possesses a O(\textit{N}) internal symmetry. We give a critical condition of instability for the potential ag…