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9 papers · 2 filters
Natural inflation with and without modulations in type IIB string theory
Hiroyuki Abe, Tatsuo Kobayashi, Hajime Otsuka
We propose a mechanism for the natural inflation with and without modulation in the framework of type IIB string theory on toroidal orientifold or orbifold. We explicitly construct…
Towards natural inflation from weakly coupled heterotic string theory
Hiroyuki Abe, Tatsuo Kobayashi, Hajime Otsuka
We propose the natural inflation from the heterotic string theory on "Swiss-Cheese" Calabi-Yau manifold with multiple magnetic fluxes. Such multiple magnetic fluxes s…
Inflation in supergravity without Kahler potential
Shuntaro Aoki, Yusuke Yamada
We propose a new class of inflation models in supergravity with higher derivative terms. In those models, the Kähler potential does not contain the inflaton multiplet, but a supers…
Illustrating SUSY breaking effects on various inflation mechanisms
Hiroyuki Abe, Shuntaro Aoki, Fuminori Hasegawa +1
We consider the supersymmetry breaking effects on typical inflation models with different types of Kähler potential. The critical size of supersymmetry-breaking scale, above which…
Moduli inflation in five-dimensional supergravity models
Hiroyuki Abe, Hajime Otsuka
We propose a simple but effective mechanism to realize an inflationary early universe consistent with the observed WMAP, Planck and/or BICEP2 data, which would be incorporated in v…
Combined features in the primordial spectra induced by a sudden turn in two-field DBI inflation
Shuntaro Mizuno, Ryo Saito, David Langlois
We investigate the features generated by a sharp turn along the inflationary trajectory in a two-field model of Dirac-Born-Infeld inflation, where one of the fields is heavy. Disti…