140 citations · 995 across the 59 of their papers we have counts for
5 papers · 1 filter
Quantum noise and large-scale cosmic microwave background anisotropy
Chun-Hsien Wu, Kin-Wang Ng, Wolung Lee +2
We propose a new source for the cosmological density perturbation which is passive fluctuations of the inflaton driven dynamically by a colored quantum noise as a result of its cou…
Running spectral index and mode-mode correlation of inflationary perturbations from off-equilibrium effects
Da-Shin Lee, Li-Zhi Fang, Wolung Lee +1
We study the off-equilibrium effects of inflaton on the dynamics of primordial perturbations in the O(N) model. A self-consistent off-equilibrium formalism is employed to investiga…
Off-equilibrium dynamics of the primordial perturbations in the inflationary universe: the O(N) model
Wolung Lee, Yeo-Yie Charng, Da-Shin Lee +1
Using the O(N) model as an example, we investigate the self-interaction effects of inflaton on the dynamics of the primordial perturbations. When taking interactions into account,…
Bound on the time variation of the fine structure constant driven by quintessence
Da-Shin Lee, Wolung Lee, Kin-Wang Ng
The bound on the time variation of the fine structure constant () driven by the dynamics of quintessence scalar field which is coupled to electromagnetism is discussed using phe…
Primordial Magnetic Fields from Dark Energy
Da-Shin Lee, Wolung Lee, Kin-Wang Ng
Evidences indicate that the dark energy constitutes about two thirds of the critical density of the universe. If the dark energy is an evolving pseudo scalar field that couples to…