136 citations · 278 across the 9 of their papers we have counts for
6 papers · 1 filter
The limit on for tachyon dark energy
Ximing Chen, Yungui Gong
We get the same degeneracy relation between and for the tachyon fields as for quintessence and phantom fields. Our results show that the dynamics of scalar fields with…
The dynamical behavior of the Extended Holographic Dark Energy with Hubble Horizon
Jie Liu, Yungui Gong, Ximing Chen
The extended holographic dark energy model with the Hubble horizon as the infrared cutoff avoids the problem of the circular reasoning of the holographic dark energy model. Unfortu…
Phase-space analysis of interacting phantom cosmology
Xi-ming Chen, Yungui Gong, Emmanuel N. Saridakis
We perform a detailed phase-space analysis of various phantom cosmological models, where the dark energy sector interacts with the dark matter one. We examine whether there exist l…
Fixed points in interacting dark energy models
Xi-ming Chen, Yungui Gong
The dynamical behaviors of two interacting dark energy models are considered. In addition to the scaling attractors found in the non-interacting quintessence model with exponential…
Constraints on Dark Energy Models from Weak Gravity Conjecture
Ximing Chen, Jie Liu, Yungui Gong
We study the constraints on the dark energy model with constant equation of state parameter and the holographic dark energy model by using the weak gravity conjecture. The…
Constraints on a new alternative model to dark energy
Yungui Gong, Xi-Ming Chen
The recent type Ia supernova data suggest that the universe is accelerating now and decelerated in recent past. This may provide the evidence that the standard Friedmann equation n…