1.4k citations · 20.1k across the 245 of their papers we have counts for
245 papers
One-loop tensor power spectrum from an excited scalar field during inflation
Atsuhisa Ota, Misao Sasaki, Yi Wang
We present a consistent one-loop calculation for the inflationary tensor power spectrum in the presence of an excited spectator scalar field using the in-in formalism. We find that…
Threshold of Primordial Black Hole Formation against Velocity Dispersion in Matter-Dominated Era
Tomohiro Harada, Kazunori Kohri, Misao Sasaki +2
We study the effects of velocity dispersion on the formation of primordial black holes~(PBHs) in a matter-dominated era. The velocity dispersion is generated through the nonlinear…
Logarithmic Duality of the Curvature Perturbation
Shi Pi, Misao Sasaki
We study the comoving curvature perturbation in the single-field inflation models whose potential can be approximated by a piecewise quadratic potential by usi…
Super-horizon resonant magnetogenesis during inflation
Misao Sasaki, Valeri Vardanyan, Vicharit Yingcharoenrat
We propose a novel mechanism for significantly enhancing the amplitude of primordial electromagnetic fields during inflation. Similar to existing proposals, our idea is based on pa…
Gravitational waves from rapid structure formation on microscopic scales before matter-radiation equality
Marcos M. Flores, Alexander Kusenko, Misao Sasaki
The existence of scalar fields can be probed by observations of stochastic gravitational waves. Scalar fields mediate attractive forces, usually stronger than gravity, on the lengt…
Scale-invariant enhancement of gravitational waves during inflation
Atsuhisa Ota, Misao Sasaki, Yi Wang
The inflationary 1-loop tensor power spectrum from an excited spectator scalar field is calculated. Recent studies on primordial black holes suggest that the inflationary curvature…