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Pre-inflationary universe in loop quantum cosmology
The evolutions of the flat FLRW universe and its linear perturbations are studied systematically in the dressed metric approach of LQC. When it is dominated by the kinetic energy of the inflaton atExpand
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LETTER: Generalized Vaidya Solutions
A large family of solutions, representing, ingeneral, spherically symmetric Type II fluid, ispresented, which includes most of the known solutions tothe Einstein field equations, such as, theExpand
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Born-Infeld black holes in (A)dS spaces
We study some exact solutions in a D(greater than or equal to4)-dimensional Einstein-Born-Infeld theory with a cosmological constant. These solutions are asymptotically de Sitter or anti-de Sitter,Expand
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Hořava gravity at a Lifshitz point: A progress report
Hořava’s quantum gravity at a Lifshitz point is a theory intended to quantize gravity by using traditional quantum field theories. To avoid Ostrogradsky’s ghosts, a problem that has been facing inExpand
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Generalized instantaneous modes in higher-order scalar-tensor theories
We consider higher-order, scalar-tensor theories which appear degenerate when restricted to the unitary gauge but are not degenerate in an arbitrary gauge. We dub them U-degenerate theories. WeExpand
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Post-Newtonian approximations in the Hořava-Lifshitz gravity with extra U(1) symmetry
In this paper, we first propose a universal coupling between the gravity and matter in the framework of the Ho\v{r}ava-Lifshitz theory of gravity with an extra U(1) symmetry for both the projectableExpand
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Current constraints on interacting holographic dark energy
Abstract Although there is mounting observational evidence that the cosmic expansion is undergoing a late-time acceleration, the physical mechanism behind such a phenomenon is yet unknown. In thisExpand
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Universal features of quantum bounce in loop quantum cosmology
Abstract In this Letter, we study analytically the evolutions of the flat Friedmann–Lemaitre–Robertson–Walker (FLRW) universe and its linear perturbations in the framework of the dressed metricExpand
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Thermodynamics and stability of hyperbolic charged black holes
In AdS space the black hole horizon can be a hypersurface with a positive, zero, or negative constant curvature, resulting in different horizon topology. Thermodynamics and stability of black holesExpand
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