5 citations · 6 across the 3 of their papers we have counts for
4 papers · 1 filter
The Non-Gaussianity of Racetrack Inflation Models
Cheng-Yi Sun, De-Hai Zhang
In this paper, we use the result in [7] to calculate the non-Gaussianity of the racetrack models in [3, 5]. The two models give different non- Gaussianities. Both of them are reaso…
The Exact Evolution Equation of the Curvature Perturbation for Closed Universe
De-Hai Zhang, Cheng-Yi Sun
As is well known, the exact evolution equation of the curvature perturbation plays a very important role in investigation of the inflation power spectrum of the flat universe. Howe…
The Eventual Quintessential Big Collapse of the Closed Universe with the Present Accelerative Phase
De-Hai Zhang
Whether our universe with present day acceleration can eventually collapse is very interesting problem. We are also interesting in such problems, whether the universe is closed? Wh…
The First Acoustics Peak CMBR and Cosmic Total Density
De-Hai Zhang
Boomerang measured the first peak in CMBR to be at location of , which excites our strong interesting in it. A widely cited formula is to e…