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Inhomogeneous and interacting vacuum energy
Josue De-Santiago, David Wands, Yuting Wang
Vacuum energy is a simple model for dark energy driving an accelerated expansion of the universe. If the vacuum energy is inhomogeneous in spacetime then it must be interacting. We…
Modified Chaplygin Gas as a Unified Dark Matter and Dark Energy Model and Cosmic Constraints
Lixin Xu, Yuting Wang, Hyerim Noh
A modified Chaplygin gas model (MCG), , as a unified dark matter model and dark energy model is constrained by using c…
Revisiting Generalized Chaplygin Gas as a Unified Dark Matter and Dark Energy Model
Lixin Xu, Jianbo Lu, Yuting Wang
In this paper, we revisit generalized Chaplygin gas (GCG) model as a unified dark matter and dark energy model. The energy density of GCG model is given as $ρ_{GCG}/ρ_{GCG0}=[B_{s}…
Inhomogeneous vacuum energy
David Wands, Josue De-Santiago, Yuting Wang
Vacuum energy remains the simplest model of dark energy which could drive the accelerated expansion of the Universe without necessarily introducing any new degrees of freedom. Inho…
Cosmological constraints on the generalized holographic dark energy
Jianbo Lu, Yuting Wang, Yabo Wu +1
We use the Markov ChainMonte Carlo method to investigate global constraints on the generalized holographic (GH) dark energy with flat and non-flat universe from the current observe…