2 papers
hep-th2026
Curvature-Assisted Dynamical Compactification in a Pre-Inflationary Higher-Dimensional Universe
Yusuke Yamada
We investigate a pre-inflationary dynamical compactification scenario in which a higher-dimensional expanding universe evolves into an effectively four-dimensional one through curv…
hep-th2024
Proving the absence of large one-loop corrections to the power spectrum of curvature perturbations in transient ultra-slow-roll inflation within the path-integral approach
Ryodai Kawaguchi, Shinji Tsujikawa, Yusuke Yamada
We revisit one-loop corrections to the power spectrum of curvature perturbations in an inflationary scenario containing a transient ultra-slow-roll (USR) period. In Ref.[1], i…