4 papers
The Relative Entropy as an Increasing Function of Time in Cosmology
Cheng-Yi Sun, De-Hai Zhang
In this paper, it is shown that the relative entropy is an increasing function of time in both the linear regime and the non-linear regime during the large scale structure formatio…
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…
The Cosmological Constant as a Residual Energy in the Chaotic Inflationary Model
De-Hai Zhang
A new idea of the cosmological constant is proposed in this paper. Due to the horizon is limited, the quantum fluctuation of the inflaton field is not zero, a nonzero vacuum energy…