85 citations · 240 across the 12 of their papers we have counts for
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astro-ph.CO2024★ 4 cited
Generating large primordial fluctuations in single-field inflation for PBH formation
Jason Kristiano, Jun'ichi Yokoyama
In order to produce appreciable amount of primordial black holes (PBHs), the square amplitude of curvature perturbation must take a large value of , namely, seve…
astro-ph.CO2024★ 27 cited
Comparing sharp and smooth transitions of the second slow-roll parameter in single-field inflation
Jason Kristiano, Jun'ichi Yokoyama
In single-field inflation, violation of the slow-roll approximation can lead to growth of curvature perturbation outside the horizon. This violation is characterized by a period wi…