201 citations · 741 across the 36 of their papers we have counts for
36 papers
Kinetically stabilized inflation
Changhong Li, Hao Gong, Yeuk-kwan Edna Cheung
In this work, we propose a string-inspired two fields inflation model to address the fine-tuning problem that the standard inflation model suffers. The fast-rolling tachyon $\mathc…
Influence of the correlation prior on reconstruction of the dark energy equation of state
Youhua Xu, Hu Zhan, Yeuk-Kwan Edna Cheung
Non-parametric reconstruction of the dark energy equation of state (EoS) aims to determine the EoS as a function of redshift without invoking any particular dark energy model, so t…
Dynamics of scalar fields in an expanding/contracting cosmos at finite temperature
Hui Xu, Lei Ming, Yeuk-Kwan E. Cheung
This paper extends the study of the quantum dissipative effects of a cosmological scalar field by taking into account the cosmic expansion and contraction. Cheung, Drewes, Kang and…
Primordial Gravitational Waves Spectrum in the Coupled-Scalar-Tachyon Bounce Universe
Nan Zhang, Yeuk-Kwan E. Cheung
We derive in detail the equations of motion for the tensorial modes of primordial metric perturbations in the Coupled-Scalar-Tachyon Bounce Universe. We solve for the gravitational…
Reconstructing the Cosmic Expansion History with a Monotonicity Prior
Youhua Xu, Hu Zhan, Yeuk-Kwan Edna Cheung
The cosmic expansion history, mapped by the Hubble parameter as a function of redshift, offers the most direct probe of the dark energy equation of state. One way to determine the…
On-Shell Gauge Invariant Three-Point Amplitudes
Zhengdi Sun, Hui Xu, Yeuk-Kwan E. Cheung
Assuming locality, Lorentz invariance and parity conservation we obtain a set of differential equations governing the 3-point interactions of massless bosons, which in turn determi…