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Gravity Waves from Tachyonic Preheating after Hybrid Inflation
Jean Francois Dufaux, Gary N. Felder, Lev Kofman +1
We study the stochastic background of gravitational waves produced from preheating in hybrid inflation models. We investigate different dynamical regimes of preheating in these mod…
Gravity Waves Signatures from Anisotropic pre-Inflation
A. E. Gumrukcuoglu, Lev Kofman, Marco Peloso
We show that expanding or contracting Kasner universes are unstable due to the amplification of gravitational waves (GW). As an application of this general relativity effect, we co…
"Black Universe" epoch in String Cosmology
Alex Buchel, Lev Kofman
String theory compactification involves manifolds with multiple warp factors. For cosmological applications, one often introduces a short, high-energy inflationary throat, and a lo…
Dangerous Angular KK/Glueball Relics in String Theory Cosmology
J. F. Dufaux, L. Kofman, M. Peloso
The presence of Kaluza-Klein particles in the universe is a potential manifestation of string theory cosmology. In general, they can be present in the high temperature bath of the…