53 citations · 239 across the 12 of their papers we have counts for
12 papers
Pulsar timing array observations as possible hints for nonsingular cosmology
Mian Zhu, Gen Ye, Yong Cai
Recent pulsar timing array (PTA) experiments have reported strong evidence of the stochastic gravitational wave background (SGWB). If interpreted as primordial gravitational waves…
Primordial black holes from null energy condition violation during inflation
Yong Cai, Mian Zhu, Yun-Song Piao
Primordial black holes (PBHs) and the violation of the null energy condition (NEC) have significant implications for our understanding of the very early universe. We present a nove…
Higher-order correction to weak-field lensing of an Ellis-Bronnikov wormhole
Tingqi Cai, Hyat Huang, Zun Wang +1
The gravitational lensing effect at higher order under weak-field approximation is believed to be important to distinguish black holes and other compact objects such as wormholes.…
Parity-violation in bouncing cosmology
Mian Zhu, Yong Cai
We investigate the possibility of the enhancement of parity-violation signal in bouncing cosmology. Specifically, we are interested in deciding which phase should generate the most…
Microlensing effects of wormholes associated to blackhole spacetimes
Ke Gao, Lei-Hua Liu, Mian Zhu
In this paper, we investigate the microlensing effects of wormholes associated to black hole spacetimes. Specifically, we work on three typical wormholes (WH): Schwarzschild WH, Ke…
Enhance Primordial Black Hole Abundance through the Non-linear Processes around Bounce Point
Jie-Wen Chen, Mian Zhu, Sheng-Feng Yan +2
The non-singular bouncing cosmology is an alternative paradigm to inflation, wherein the background energy density vanishes at the bounce point, in the context of Einstein gravity.…
Microlensing effect of charged spherically symmetric wormhole
Lei-Hua Liu, Mian Zhu, Wentao Luo +2
We systematically investigate the microlensing effect of charged spherically symmetric wormhole, where the light source is remote from the throat. Remarkably, there will be at most…
Obstacles from interstellar matters and distortion in warp drive superluminal travel scenario
Siyu Bian, Yi Wang, Zun Wang +1
We investigate obstacles of superluminal "warp drive" travels from interactions with interstellar matter and from curvature effects. The effect of collision of interstellar dust pa…
Scalar and Tensor Perturbations in DHOST Bounce Cosmology
Mian Zhu, Amara Ilyas, Yunlong Zheng +2
We investigate the bounce realization in the framework of DHOST cosmology, focusing on the relation with observables. We perform a detailed analysis of the scalar and tensor pertur…
Emergent Universe and Genesis from the DHOST Cosmology
Amara Ilyas, Mian Zhu, Yunlong Zheng +1
In this article, we present an emergent universe scenario that can be derived from DHOST cosmology. The universe starts asymptotically Minkowski in the far past just like the regul…
Quantum Creation of a Toy Universe without Inflation
Yi Wang, Mian Zhu
We propose a toy model for the origin of the universe, where the scale-invariant fluctuations are generated together with the quantum creation process of the universe. The fluctuat…
Primordial Magnetic Field from Gravitationally Coupled Electrodynamics in Bouncing Scenario
Jie-Wen Chen, Chong-Huan Li, Yu-Bin Li +1
We in this paper study the generation of primordial magnetic field (PMF) in the non-singular bouncing scenario, through the coupling of the electromagnetic field to gravity. We ado…