We find several missing one-loop-order contributions in previous considerations about
secondary gravitational waves induced at nonlinear order in cosmological perturbations. We …

We revisit the growth of curvature perturbations in non-minimal curvaton scenario with a non-
trivial field metric λ (ϕ) where ϕ is an inflaton field, and incorporate the effect from the non …

Rotations of axion fields in the early Universe can produce dark matter and the matter-
antimatter asymmetry of the Universe. We point out that the rotation can generate an …

We investigate the scalar induced gravitational waves (SIGWs) in the Chern-Simons (CS)
gravity with a dynamical scalar field during slow roll inflation. Due to the parity violation in …

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 the …

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 …

We study gauge preheating following pseudoscalar-driven inflation in full general relativity.
We implement the Baumgarte-Shapiro-Shibata-Nakamura (BSSN) scheme to solve the full …

We study gravitational wave memory effect in the Friedmann-Robertson-Walker
cosmological model with matter and a cosmological constant. Since the background is …

We study gauge preheating following pseudoscalar-driven inflation in full general relativity.
We implement the Baumgarte-Shapiro-Shibata-Nakamura (BSSN) scheme to solve the full …

We study the scalar induced gravitational waves (SIGWs) from a chiral scalar–tensor theory
of gravity. The parity-violating (PV) Lagrangian contains the Chern–Simons (CS) term and …