5 citations · 5 across the 1 of their papers we have counts for
6 papers
No-go theorem of anisotropic inflation via Schwinger mechanism
Hiroyuki Kitamoto
In the presence of a dilatonic coupling between an inflaton and a gauge field, a persistent electric field (i.e., an anisotropic inflation) is obtained as a solution of the…
Holographic function in de Sitter space
Hiroyuki Kitamoto, Yoshihisa Kitazawa
We investigate infrared logarithms in de Sitter space from holographic perspective. We employ a gravitational Fokker-Planck equation to investigate the time evolution of the de Sit…
de Sitter duality and logarithmic decay of dark energy
Hiroyuki Kitamoto, Yoshihisa Kitazawa, Takahiko Matsubara
We investigate infrared dynamics of four-dimensional Einstein gravity in de Sitter space. We set up a general framework to investigate dynamical scaling relations in quantum/classi…
Entropy Generation at the Horizon Diffuses Cosmological Constant in 2D de Sitter Space
Hiroyuki Kitamoto, Yoshihisa Kitazawa
We investigate a solution of the exactly renormalized Liouville action to foresee the fate of the two-dimensional de Sitter space. We work in the semiclassical region with a large…
Infrared resummation for derivative interactions in de Sitter space
Hiroyuki Kitamoto
In de Sitter space, scale invariant fluctuations give rise to infrared logarithmic corrections to physical quantities, which eventually spoil perturbation theories. For models with…
Schwinger Effect in Inflaton-Driven Electric Field
Hiroyuki Kitamoto
In a four dimensional inflation theory, a persistent electric field can be established by making the inflaton coupled to the gauge field like a dilaton. We investigate the pair pro…