1.5k citations · 10.6k across the 150 of their papers we have counts for
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A Nonsingular Cosmology with a Scale-Invariant Spectrum of Cosmological Perturbations from Lee-Wick Theory
Yi-Fu Cai, Taotao Qiu, Robert Brandenberger +1
We study the cosmology of a Lee-Wick type scalar field theory. First, we consider homogeneous and isotropic background solutions and find that they are nonsingular, leading to cosm…
N-flation from multiple DBI type actions
Yi-Fu Cai, Wei Xue
In this letter we present a new N-flation model constructed by making use of multiple scalar fields which are being described by their own DBI action. We show that the dependence o…
Evolution of Metric Perturbations in Quintom Bounce model
Yi-Fu Cai, Xinmin Zhang
We in the paper study the metric perturbations generated in a bouncing universe driven by the Quintom matter. Firstly, we review the background evolution of Quintom Bounce and the…
A Model Of Inflationary Cosmology Without Singularity
Yi-Fu Cai, Tao-tao Qiu, Jun-Qing Xia +1
In this letter, we propose a model of inflationary cosmology with a bounce preceded and study its primordial curvature perturbations. Our model gives rise to a primordial power spe…
Dark Energy Model with Spinor Matter and Its Quintom Scenario
Yi-Fu Cai, Jing Wang
A class of dynamical dark energy models, dubbed Spinor Quintom, can be constructed by a spinor field with a nontraditional potential. We find that, if choosing suitable potenti…