117 citations · 404 across the 10 of their papers we have counts for
10 papers
The Reconstruction of Non-Minimal Derivative Coupling Inflationary Potentials
Qin Fei, Zhu Yi, Yingjie Yang
We derive the reconstruction formulae for the inflation model with the non-minimal derivative coupling term. If reconstructing the potential from the tensor-to-scalar ratio, we cou…
Testing kinetically coupled inflation models with CMB distortions
Rui Dai, Yi Zhu
Inflation scenarios kinetically coupled with the Einstein tensor have been widely studied. They can be consistent with current observational data. Future experiments on the measure…
The reconstruction of tachyon inflationary potentials
Qin Fei, Yungui Gong, Jiong Lin +1
We derive a lower bound on the field excursion for the tachyon inflation, which is determined by the amplitude of the scalar perturbation and the number of -folds before the end…
PPN parameters in gravitational theory with nonminimally derivative coupling
Zhu Yi, Yungui Gong
The nonminimal coupling of the kinetic term to Einstein's tensor helps the implementation of inflationary models due to the gravitationally enhanced friction. We calculate the para…
Feynman Diagrams for Stochastic Inflation and Quantum Field Theory in de Sitter Space
Bjorn Garbrecht, Florian Gautier, Gerasimos Rigopoulos +1
We consider a massive scalar field with quartic self-interaction in de~Sitter spacetime and present a diagrammatic expansion that describes the field as driven by stoch…
Testing Inflation and Curvaton Scenarios with CMB Distortions
Sebastien Clesse, Björn Garbrecht, Yi Zhu
Prior to recombination, Silk damping causes the dissipation of energy from acoustic waves into the monopole of the Cosmic Microwave Background (CMB), resulting in spectral distorti…
Infrared Correlations in de Sitter Space: Field Theoretic vs. Stochastic Approach
Bjorn Garbrecht, Gerasimos Rigopoulos, Yi Zhu
We consider massive λϕ^4 theory in de Sitter background. The mass of the scalar field ϕis chosen small enough, such that the amplification of superhorizon momentum modes leads to a…
Non-Gaussianities and Curvature Perturbations from Hybrid Inflation
Sébastien Clesse, Björn Garbrecht, Yi Zhu
For the original hybrid inflation as well as the supersymmetric F-term and D-term hybrid models, we calculate the level of non-gaussianities and the power spectrum of curvature per…
Can the Reissner-Nordström black hole or Schwarzschild black hole be the stable Planck-scale particle accelerator?
Yi Zhu, Shao-Feng Wu, Yin Jiang +1
It is shown that the extremal Reissner-Nordström black hole, the non-extremal one with multiple scattering particles, and the Schwarzschild black hole with radial head-on particles…
General stationary charged black holes as charged particle accelerators
Yi Zhu, Shao-Feng Wu, Yu-Xiao Liu +1
We study the possibility of getting infinite energy in the center of mass frame of colliding charged particles in a general stationary charged black hole. For black holes with two-…