156 citations · 1.5k across the 26 of their papers we have counts for
34 papers · 1 filter
On the full quantum trispectrum in multi-field DBI inflation
Shuntaro Mizuno, Frederico Arroja, Kazuya Koyama
We compute the leading order connected four-point function of the primordial curvature perturbation coming from the four-point function of the fields in multi-field DBI inflation m…
Lorentz boost and non-Gaussianity in multi-field DBI-inflation
Shuntaro Mizuno, Frederico Arroja, Kazuya Koyama +1
We show that higher-order actions for cosmological perturbations in the multi-field DBI-inflation model are obtained by a Lorentz boost from the rest frame of the brane to the fram…
Induced gravity on intersecting brane-worlds Part II: Cosmology
Olindo Corradini, Kazuya Koyama, Gianmassimo Tasinato
We explore cosmology of intersecting braneworlds with induced gravity on the branes. We find the cosmological equations that control the evolution of a moving codimension one brane…
Non-gaussianity from the trispectrum in general single field inflation
Frederico Arroja, Kazuya Koyama
We compute the fourth order action in perturbation theory for scalar and second order tensor perturbations for a minimally coupled single field inflationary model, where the inflat…
Induced gravity on intersecting brane-worlds Part I: Maximally symmetric solutions
Olindo Corradini, Kazuya Koyama, Gianmassimo Tasinato
We explore models of intersecting brane-worlds with induced gravity terms on codimension one branes and on their intersection. Maximally symmetric solutions for the branes and the…
Low energy effective theory on a regularized brane in 6D gauged chiral supergravity
Frederico Arroja, Tsutomu Kobayashi, Kazuya Koyama +1
We derive the low energy effective theory on a brane in six-dimensional chiral supergravity. The conical 3-brane singularities are resolved by introducing cylindrical codimension o…