31 citations · 52 across the 5 of their papers we have counts for
5 papers
Improved model of large-field inflation with primordial black hole production in Starobinsky-like supergravity
Ryotaro Ishikawa, Sergei V. Ketov
A viable model of large-field (chaotic) inflation with efficient production of primordial black holes is proposed in Starobinsky-like (modified) supergravity leading to the "no-sca…
Pole inflation and primordial black holes formation in Starobinsky-like supergravity
Shuntaro Aoki, Ryotaro Ishikawa, Sergei V. Ketov
We extend the Cecotti-Kallosh model of Starobinsky inflation in supergravity by adding a holomorphic function to the superpotential in order to generate a large peak in the power s…
Exploring the parameter space of modified supergravity for double inflation and primordial black hole formation
Ryotaro Ishikawa, Sergei V. Ketov
We study the parameter space of the effective (with two scalars) models of cosmological inflation and primordial black hole (PBH) formation in the modified supergravity.…
Gravitino condensate in supergravity coupled to the supersymmetric Born-Infeld theory
Ryotaro Ishikawa, Sergei V. Ketov
The supersymmetric Born-Infeld theory coupled to supergravity in four spacetime dimensions is studied in the presence of a cosmological term with spontaneous supersymme…
Beyond Starobinsky inflation
Yermek Aldabergenov, Ryotaro Ishikawa, Sergei V. Ketov +1
A supergravity extension of the gravity with the additional (Born-Infeld) structure of a massive vector multiplet gives rise to the specific gravity, whose structu…