158 citations · 2.9k across the 154 of their papers we have counts for
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Removing instability of Polonyi-Starobinsky supergravity by adding FI term
Yermek Aldabergenov, Sergei V. Ketov
Polonyi-Starobinsky (PS) supergravity is the N=1 supergravity model of Starobinsky inflation with spontaneous supersymmetry breaking (after inflation) due to Polonyi superfield, an…
Inflation from higher dimensions
Hiroshi Nakada, Sergei V. Ketov
We derive the scalar potential in four spacetime dimensions from an eight-dimensional gravity model in the presence of the 4-form , with the (modified grav…
Gravitino and Polonyi production in supergravity
Andrea Addazi, Sergei V. Ketov, Maxim Yu. Khlopov
We study production of gravitino and Polonyi particles in the minimal Starobinsky-Polonyi supergravity with inflaton belonging to a massive vector supermultiplet. O…
No inflation in type IIA strings on rigid CY spaces
Yuki Wakimoto, Sergei V. Ketov
We investigate whether cosmological inflation is possible in a class of flux compactifications of type IIA strings on rigid Calabi-Yau manifolds, when all perturbative string corre…
Inflation from Gravity in Higher Dimensions
Sergei V. Ketov, Hiroshi Nakada
We propose a derivation of the inflaton scalar potential from the higher dimensional gravity, with the new coupling constant and the cosmological constant $…
Energy conditions in Starobinsky supergravity
Andrea Addazi, Sergei V. Ketov
We consider the classical energy conditions (strong, null and weak) in Starobinsky supergravity theories. We study in detail the simplest Starobinsky supergravity model in the "old…