201 citations · 741 across the 36 of their papers we have counts for
22 papers · 1 filter
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…
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…
A Combinatoric Shortcut to Evaluate CHY-forms
Gang Chen, Yeuk-Kwan E. Cheung, Tianheng Wang +1
In \cite{Chen:2016fgi} we proposed a differential operator for the evaluation of the multi-dimensional residues on isolated (zero-dimensional) poles.In this paper we discuss some n…
Following the density perturbations through a bounce with AdS/CFT Correspondence
Lei Ming, Taifan Zheng, Yeuk-Kwan E. Cheung
A bounce universe model, known as the coupled-scalar-tachyon bounce (CSTB) universe, has been shown to solve the Horizon, Flatness and Homogeneity problems as well as the Big Bang…
A differential operator for integrating one-loop scattering equations
Gang Chen, Yeuk-Kwan E. Cheung, Tianheng Wang +1
We propose a differential operator for computing the residues associated with a class of meromorphic -forms that frequently appear in the Cachazo-He-Yuan form of the scattering…
Top-forms of Leading Singularities in Nonplanar Multi-loop Amplitudes
Baoyi Chen, Gang Chen, Yeuk-Kwan E. Cheung +2
The on-shell diagram is a very important tool in studying scattering amplitudes. In this paper we discuss the on-shell diagrams without external BCFW-bridges. We introduce an extra…