338 citations · 1.2k across the 14 of their papers we have counts for
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Cosmological Fluctuations from Infra-Red Cascading During Inflation
Neil Barnaby, Zhiqi Huang, Lev Kofman +1
We propose a qualitatively new mechanism for generating cosmological fluctuations from inflation. The non-equilibrium excitation of interacting scalar fields often evolves into inf…
"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…
Rapid roll Inflation with Conformal Coupling
Lev Kofman, Shinji Mukohyama
Usual inflation is realized with a slow rolling scalar field minimally coupled to gravity. In contrast, we consider dynamics of a scalar with a flat effective potential, conformall…
Trans-Planckian Issue in the Milne Universe
Pascal M. Vaudrevange, Lev Kofman
The ``trans-Planckian'' challenge in cosmology appears when we trace the present physical wavelengths of fluctuations backwards in time. They become smaller and smaller until cross…
Roulette Inflation with Kähler Moduli and their Axions
J. R. Bond, L. Kofman, S. Prokushkin +1
We study 2-field inflation models based on the ``large-volume'' flux compactification of type IIB string theory. The role of the inflaton is played by a Kähler modulus τcorrespondi…