173 citations · 679 across the 13 of their papers we have counts for
13 papers
Evading the CMB -distortion bound on Supermassive Primordial Black Hole seeds with Non-Gaussian tails
Sanket Dave, Sheng-Feng Yan, Amara Ilyas +1
Supermassive black holes (SMBHs) powering quasars at are difficult to grow from stellar mass remnants, motivating seeds from primordial black holes (PBHs) with masses…
Primordial Black Hole Formation in Dust-Radiation Bouncing Cosmologies
Xuan Ye, Luiz Felipe Demetrio, Eduardo Jose Barroso +2
Primordial black holes (PBHs) provide a unique probe of the early Universe and may have an enhanced abundance in bouncing cosmologies, where a long contracting phase can amplify pe…
Atomic Quantum Sensors for High-Frequency Gravitational Wave Searches
Yi-fu Cai, Luca Visinelli, Sheng-Feng Yan
High-frequency gravitational waves (GWs), spanning frequencies from the microwave to the optical band, remain experimentally unexplored despite strong motivation from early-Univers…
A Compaction Function Analysis of CMB distortion Constraints on Primordial Black Holes
Junyue Yang, Xiaoding Wang, Xiao-Han Ma +4
Primordial black holes (PBHs) are considered viable candidates for dark matter and the seeds of supermassive black holes (SMBHs), with their fruitful physical influences providing…
Limits on scalar-induced gravitational waves from the stochastic background by pulsar timing array observations
Yi-Fu Cai, Xin-Chen He, Xiao-Han Ma +2
Recently, the NANOGrav, PPTA, EPTA, and CPTA collaborations independently reported their evidence of the Stochastic Gravitational Waves Background (SGWB). While the inferred gravit…
Primordial black hole mass functions as a probe of cosmic origin
Yi-Fu Cai, Chengfeng Tang, Geyu Mo +7
We discuss a novel window to probe the origin of our universe via the mass functions of primordial black holes (PBHs). The mass functions of PBHs are simply estimated using the con…
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.…
Gaussian processes and effective field theory of gravity under the tension
Xin Ren, Sheng-Feng Yan, Yaqi Zhao +2
We consider the effective field theory formulation of torsional gravity in a cosmological framework to alter the background evolution. Then we use the latest measurement from…
Sound speed resonance of the stochastic gravitational wave background
Yi-Fu Cai, Chunshan Lin, Bo Wang +1
We propose a novel mechanism to test time variation of the propagation speed of gravitational waves (GWs) in light of GWs astronomy. As the stochastic GWs experience the whole hist…
Testing the equivalence principle via the shadow of black holes
Chunlong Li, Sheng-Feng Yan, Lingqin Xue +5
We study the equivalence principle, regarded as the cornerstone of general relativity, by analyzing the deformation observable of black hole shadows. Such deformation can arise fro…
Interpreting cosmological tensions from the effective field theory of torsional gravity
Sheng-Feng Yan, Pierre Zhang, Jie-Wen Chen +3
Cosmological tensions can arise within CDM scenario amongst different observational windows, which may indicate new physics beyond the standard paradigm if confirmed by measurem…
When Primordial Black Holes from Sound Speed Resonance Meet a Stochastic Background of Gravitational Waves
Yi-Fu Cai, Chao Chen, Xi Tong +2
As potential candidates of dark matter, primordial black holes (PBHs) are within the core scopes of various astronomical observations. In light of the explosive development of grav…
Primordial Black Holes from Sound Speed Resonance during Inflation
Yi-Fu Cai, Xi Tong, Dong-Gang Wang +1
We report on a novel phenomenon of the resonance effect of primordial density perturbations arisen from a sound speed parameter with an oscillatory behavior, which can generically…