116 citations · 551 across the 20 of their papers we have counts for
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astro-ph.CO2022★ 17 cited
Sudden braking and turning with a two-field potential bump: primordial black hole formation
Chengjie Fu, Chao Chen
We investigate the amplification of curvature perturbations in a two-field inflation model featuring a Gaussian potential bump. When the inflaton encounters a potential bump along…
astro-ph.CO2022★ 32 cited
Missing one-loop contributions in secondary gravitational waves
Chao Chen, Atsuhisa Ota, Hui-Yu Zhu +1
We find several missing one-loop-order contributions in previous considerations about secondary gravitational waves induced at nonlinear order in cosmological perturbations. We con…
astro-ph.CO2022★ 9 cited
Induced gravitational waves from statistically anisotropic scalar perturbations
Chao Chen, Atsuhisa Ota
Scalar-induced gravitational waves (SIGWs) are attracting growing attention for probing extremely short-scale scalar perturbations via gravitational wave measurements. In this pape…