145 citations · 1k across the 11 of their papers we have counts for
11 papers
Violating Electrodynamics and Chern-Simons Modified Gravity
Mingzhe Li, Yi-Fu Cai, Xiulian Wang +1
The electrodynamics with a Chern-Simons term violates Lorentz and symmetries with a non-vanishing . For a fixed vector , in this paper we…
Non-singular cosmology in a model of non-relativistic gravity
Yi-Fu Cai, Emmanuel N. Saridakis
We present a model of non-relativistic gravitational theory which is power-counting renormalizable in 3+1 dimensional spacetime. When applied to cosmology, the relativity-violation…
Non-Gaussianity in a Matter Bounce
Yi-Fu Cai, Wei Xue, Robert Brandenberger +1
A nonsingular bouncing cosmology in which the scales of interest today exit the Hubble radius in a matter-dominated contracting phase yields an alternative to inflation for produci…
Cosmic Ray Positrons from Cosmic Strings
Robert Brandenberger, Yi-Fu Cai, Wei Xue +1
We study the spectrum of cosmic ray positrons produced by a scaling distribution of non-superconducting cosmic strings. In this scenario, the positrons are produced from the jets w…
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…