85 citations · 240 across the 12 of their papers we have counts for
6 papers · 1 filter
Effective Dynamics of Inflationary End-of-the-World Branes in AdS
Kosei Fujiki, Michitaka Kohara, Jason Kristiano +2
We develop an effective description of a two-dimensional cosmological end-of-the-world brane embedded in AdS, with a scalar field localized on the brane. Integrating out bulk d…
Inflationary background renormalization
Jason Kristiano, Jun'ichi Yokoyama
In cosmic inflation, non-linearities of the curvature perturbation can induce backreaction to the background. To obtain observational predictions at non-linear order on the correct…
Note on the bispectrum and one-loop corrections in single-field inflation with primordial black hole formation
Jason Kristiano, Jun'ichi Yokoyama
Primordial black holes can be formed from the collapse of large-amplitude perturbation on small scales in the early Universe. Such an enhanced spectrum can be realized by introduci…
Constraining Primordial Black Hole Formation from Single-Field Inflation
Jason Kristiano, Jun'ichi Yokoyama
The most widely studied formation mechanism of a primordial black hole is collapse of large-amplitude perturbation on small scales generated in single-field inflation. In this Lett…
Perturbative region on non-Gaussian parameter space in single-field inflation
Jason Kristiano, Jun'ichi Yokoyama
We calculate one-loop correction to the two-point functions of curvature perturbation in single-field inflation generated by cubic self-interaction. Incorporating the observed red-…
Why Must Primordial Non-Gaussianity Be Very Small?
Jason Kristiano, Jun'ichi Yokoyama
One-loop correction to the power spectrum in generic single-field inflation is calculated by using standard perturbation theory. Because of the enhancement inversely proportional t…