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12 papers · 2 filters
Note on the super inflation in loop quantum cosmology
Kui Xiao, Xiao-Kai He, Jian-Yang Zhu
Phenomenological effect of the super-inflation in loop quantum cosmology (LQC) is discussed. We investigate the case that the Universe is filled with the interacting field between…
General proof of the entropy principle for self-gravitating fluid in static spacetimes
Xiongjun Fang, Sijie Gao
We show that for any perfect fluid in a static spacetime, if the Einstein constraint equation is satisfied and the temperature of the fluid obeys Tolman's law, then the other compo…
Consistency of the tachyon warm inflationary universe models
Xiao-Min Zhang, Jian-Yang Zhu
This study concerns the consistency of the tachyon warm inflationary models. A linear stability analysis is performed to find the slow-roll conditions, characterized by the potenti…
The evolution of the power law k-essence cosmology
Rong-Jia Yang, Bohai Chen, Jun Li +1
We investigate the evolution of the power law k-essence field in FRWL spacetime. The autonomous dynamical system and critical points are obtained. The corresponding cosmological pa…
A comparison between Jordan and Einstein frames of Brans-Dicke gravity a la loop quantum cosmology
Michal Artymowski, Yonnge Ma, Xiangdong Zhang
It is well known that the Jordan and Einstein frames are equivalent to each other in classical Brans-Dicke theory, provided that one and the same metric is employed for the physica…
Testing cosmic censorship conjecture near extremal black holes with cosmological constants
Yuan Zhang, Sijie Gao
It has been shown previously that an extremal Reissner-Nordström or an extremal Kerr black hole cannot be overcharged or overspun by a test particle if radiative and self-force eff…