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11 papers · 2 filters
Model-independent constraints on cosmic curvature: implication from the future gravitational wave observation DECIGO
Xiaogang Zheng, Shuo Cao, Yuting Liu +5
A model-independent test of the cosmic curvature parameter is very important in cosmology. In order to estimate cosmic curvature from cosmological probes like standard candle…
Measuring the viscosity of dark matter with strongly lensed gravitational waves
Shuo Cao, Jingzhao Qi, Marek Biesiada +3
Based on the strongly lensed gravitational waves (GWs) from compact binary coalescence, we propose a new strategy to examine the fluid shear viscosity of dark matter (DM) in the gr…
Primordial Non-Gaussianity from G-inflation
Fengge Zhang, Yungui Gong, Jiong Lin +2
Enormous information about interactions is contained in the non-Gaussianities of the primordial curvature perturbations, which are essential to break the degeneracy of inflationary…
Measurements of the Hubble constant and cosmic curvature with quasars: ultra-compact radio structure and strong gravitational lensing
Jing-Zhao Qi, Jia-Wei Zhao, Shuo Cao +2
Although the Hubble constant and spatial curvature have been measured with very high precision, they still suffer from some tensions. In this paper, we propose an imp…
Primordial black holes and secondary gravitational waves from inflationary model with a non-canonical kinetic term
Zhu Yi, Qing Gao, Yungui Gong +1
With the enhancement mechanism provided by a noncanonical kinetic term with a peak, the amplitude of primordial curvature perturbations can be enhanced by seven orders of magnitude…
Primordial electric fields before recombination in the early Universe
Xi-Bin Li
This work is a supplement on the previous research about primordial electromagnetic fields. In this work, three important problems are discussed: the evolution of primordial electr…