135 citations · 445 across the 12 of their papers we have counts for
5 papers · 1 filter
Probing the primordial universe with gravitational waves detectors
Yu-Tong Wang, Yong Cai, Zhi-Guo Liu +1
The spectrum of primordial gravitational waves (GWs), especially its tilt , carries significant information about the primordial universe. Combining recent aLIGO and Planck201…
Pre-inflationary genesis with CMB B-mode polarization
Zhi-Guo Liu, Hong Li, Yun-Song Piao
Recent B-mode polarization observation seems to imply the tensor tilt at large angular scale, if the primordial signal is dominated. We show that for a primordial un…
CMB anomalies from an inflationary model in string theory
Zhi-Guo Liu, Zong-Kuan Guo, Yun-Song Piao
Recent Planck measurements show some CMB anomalies on large angular scales, which confirms the early observations by WMAP. We show that an inflationary model, in which before the s…
Obtaining the CMB anomalies with a bounce from the contracting phase to inflation
Zhi-Guo Liu, Zong-Kuan Guo, Yun-Song Piao
Recent Planck data show the anomalies of CMB fluctuations on large angular scales, which confirms the early observations by WMAP. We continue studying an inflationary model, in whi…
A Galileon Design of Slow Expansion
Zhi-Guo Liu, Jun Zhang, Yun-Song Piao
We show a model of the slow expansion, in which the scale invariant spectrum of curvature perturbation is adiabatically induced by its increasing mode, by applying a generalized Ga…