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Brane inflation revisited after WMAP five-year results
Yin-Zhe Ma, Xin Zhang
In this paper, we revisit brane inflation models with the WMAP five-year results. The WMAP five-year data favor a red-tilted power spectrum of primordial fluctuations at the level…
Features of holographic dark energy under the combined cosmological constraints
Yin-Zhe Ma, Yan Gong, Xuelei Chen
We investigate the observational signatures of the holographic dark energy models in this paper, including both the original model and a model with an interaction term between the…
Possible theoretical limits on holographic quintessence from weak gravity conjecture
Yin-Zhe Ma, Xin Zhang
The holographic dark energy model is one of the important ways for dealing with the dark energy problems in the quantum gravity framework. In this model, the dimensionless paramete…
Variable Cosmological Constant model: the reconstruction equations and constraints from current observational data
Yin-Zhe Ma
In this paper we first give a brief review of the variable cosmological constant model and its scalar field description. We mainly discuss two types of variable cosmological consta…