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A note on supergravity inflation in braneworld
Mudassar Sabir, Waqas Ahmed, Yungui Gong +3
We discuss supergravity inflation in braneworld cosmology for the class of potentials with . These minimal SUGRA models evade the problem…
de Sitter spacetime with a Becchi-Rouet-Stora quartet
Rio Saitou, Yungui Gong
We generalize the topological model recently proposed and investigate the cosmological perturbations of the model. The model has an exact de Sitter background solution associated w…
The Simple Single Field Inflation Models and the Running of Spectral Index
Qing Gao, Yungui Gong, Tianjun Li +1
The BICEP2 experiment confirms the existence of primordial gravitational wave with the tensor-to-scalar ratio ruled out at level. The consistency of this large value of…
Causality Constraint on Noncritical Einstein-Weyl Gravity
Fu-Wen Shu, Yungui Gong
We explore, in the context of AdS/CFT correspondence, the causality constraints on the Noncritical Einstein-Weyl (NEW) gravity model in five dimensions. The scalar and shear channe…
Modified gravity emerging from thermodynamics and holographic principle
Yi Zhang, Yun-gui Gong, Zong-Hong Zhu
A new conception is proposed in Ref.\cite{Verlinde:2010hp,Padmanabhan:2009kr} that gravity is one kind of entropic force. In this letter, we try to discuss its applications to the…
A Modified Holographic Dark Energy Model with Infrared Infinite Extra Dimension(s)
Yungui Gong, Tianjun Li
We propose a modified holographic dark energy (MHDE) model with the Hubble scale as the infrared (IR) cutoff. Introducing the infinite extra dimension(s) at very large distance sca…
Brane cosmology in the Horava-Witten heterotic M-Theory on
Qiang Wu, Yungui Gong, Anzhong Wang
We study the radion stability and radion mass in the framework of the Horava-Witten (HW) heterotic M-Theory on , and find that the radion is stable and its mass can be…
On curvature coupling and quintessence fine-tuning
Yungui Gong, Anzhong Wang, Yuan-Zhong Zhang
We discuss the phenomenological model in which the potential energy of the quintessence field depends linearly on the energy density of the spatial curvature. We find that the pres…