162 citations · 2k across the 45 of their papers we have counts for
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hep-th2010★ 136 cited
Primordial non-Gaussianity from the DBI Galileons
Shuntaro Mizuno, Kazuya Koyama
We study primordial fluctuations generated during inflation in a class of models motivated by the DBI Galileons, which are extensions of the DBI action that yield second order fiel…
hep-th2010★ 19 cited
Trispectrum estimator in equilateral type non-Gaussian models
Shuntaro Mizuno, Kazuya Koyama
We investigate an estimator to measure the primordial trispectrum in equilateral type non-Gaussian models such as k-inflation, single field DBI inflation and multi-field DBI inflat…
hep-th2010★ 38 cited
Cosmological Dynamics of a Dirac-Born-Infeld field
Edmund J. Copeland, Shuntaro Mizuno, Maryam Shaeri
We analyze the dynamics of a Dirac-Born-Infeld (DBI) field in a cosmological set-up which includes a perfect fluid. Introducing convenient dynamical variables, we show the evolutio…