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Holographic Preheating: Quasi-Normal Modes and Holographic Renormalization
Yi-Fu Cai, Shu Lin, Junyu Liu +1
In the holographic description of cosmic preheating proposed in an accompanied Letter [1], the energy transfer between the inflaton and matter field at strong coupling is suggested…
Holographic Preheating
Yi-Fu Cai, Shu Lin, Junyu Liu +1
We propose a holographic description of cosmic preheating at strong coupling. In this scenario the energy transfer between the inflaton and matter field is mimicked by a model of h…
Matter bounce cosmology with a generalized single field: non-Gaussianity and an extended no-go theorem
Yu-Bin Li, Jerome Quintin, Dong-Gang Wang +1
We extend the matter bounce scenario to a more general theory in which the background dynamics and cosmological perturbations are generated by a -essence scalar field with an ar…
Fluctuations in a Cosmology with a Space-Like Singularity and their Gauge Theory Dual Description
Robert H. Brandenberger, Yi-Fu Cai, Sumit R. Das +3
We consider a time-dependent deformation of anti-de-Sitter (AdS) space-time which contains a cosmological "singularity" - a space-like region of high curvature. Making use of the A…
Evolution of cosmological perturbations and the production of non-Gaussianities through a nonsingular bounce: Indications for a no-go theorem in single field matter bounce cosmologies
Jerome Quintin, Zeinab Sherkatghanad, Yi-Fu Cai +1
Assuming that curvature perturbations and gravitational waves originally arise from vacuum fluctuations in a matter-dominated phase of contraction, we study the dynamics of the cos…
Features and stability analysis of non-Schwarzschild black hole in quadratic gravity
Yi-Fu Cai, Hezi Zhang, Junyu Liu +2
Black holes are found to exist in gravitational theories with the presence of quadratic curvature terms and behave differently from the Schwarzschild solution. We present an exhaus…