22 citations · 46 across the 3 of their papers we have counts for
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hep-th2014★ 21 cited
Time Dependent Couplings as Observables in de Sitter Space
Hiroyuki Kitamoto, Yoshihisa Kitazawa
We summarize and expand our investigations concerning the soft graviton effects on microscopic matter dynamics in de Sitter space. The physical couplings receive IR logarithmic cor…
hep-th2010★ 3 cited
Antisymmetric field in string gas cosmology
Igmar C. Rosas-López, Yoshihisa Kitazawa
We study how the introduction of a 2-form field flux modify the dynamics of a T-duality invariant string gas cosmology model of Greene, Kabat and Marnerides. It induces a repulsive…
hep-th2010★ 22 cited
Boltzmann equation in de Sitter space
Hiroyuki Kitamoto, Yoshihisa Kitazawa
In a time dependent background like de Sitter space, Feynman-Dyson perturbation theory breaks down due to infra-red divergences. We investigate an interacting scalar field theory i…