35 citations · 128 across the 12 of their papers we have counts for
12 papers
Memory Effect in Anti-de Sitter Spacetime
Chong-Sun Chu, Yoji Koyama
The geodesic deviation of a pair of test particles is an natural observable for the gravitational memory effect. Nevertheless in curved spacetime, this observable is plagued with v…
Soft Hair of Dynamical Black Hole and Hawking Radiation
Chong-Sun Chu, Yoji Koyama
Soft hair of black hole has been proposed recently to play an important role in the resolution of the black hole information paradox. Recent work has emphasized that the soft modes…
Adiabatic Regularization for Gauge Field and the Conformal Anomaly
Chong-Sun Chu, Yoji Koyama
We construct the adiabatic regularization method for a gauge field in a conformally flat spacetime by quantizing in the canonical formalism the gauge fixed theory wit…
The IR Obstruction to UV Completion for Dante's Inferno Model with Higher-Dimensional Gauge Theory Origin
Kazuyuki Furuuchi, Yoji Koyama
We continue our investigation of large field inflation models obtained from higher-dimensional gauge theories, initiated in our previous study arXiv:1407.1951. We focus on Dante's…
Dilaton, Screening of the Cosmological Constant and IR-Driven Inflation
Chong-Sun Chu, Yoji Koyama
It is known that infrared (IR) quantum fluctuations in de Sitter space could break the de Sitter symmetry and generate time dependent observable effects. In this paper, we consider…
Inflation from radion gauge-Higgs potential at Planck scale
Yugo Abe, Takeo Inami, Yoshiharu Kawamura +1
We study whether the inflation is realized based on the radion gauge-Higgs potential obtained from the one-loop calculation in the 5-dimensional gravity coupled to a gauge t…
Is cosmological constant screened in Liouville gravity with matter?
Takeo Inami, Yoji Koyama, Yu Nakayama +1
There has been a proposal that infrared quantum effects of massless interacting field theories in de-Sitter space may provide time-dependent screening of the cosmological constant.…
Large Field Inflation Models from Higher-Dimensional Gauge Theories
Kazuyuki Furuuchi, Yoji Koyama
Motivated by the recent detection of B-mode polarization of CMB by BICEP2 which is possibly of primordial origin, we study large field inflation models which can be obtained from h…
Radion stabilization in the presence of Wilson line phase
Yugo Abe, Takeo Inami, Yoshiharu Kawamura +1
We study the stabilization of an extra-dimensional radius in the presence of a Wilson line phase of an extra gauge symmetry on a five-dimensional space-time, using the effec…
Radion Inflation in Higher-Dimensional Gravity Theory
Yuichi Fukazawa, Takeo Inami, Yoji Koyama
We study a radion model for inflation and density perturbation identifying the scalar field arising from the five-dimensional gravity on with the inflaton. The inflaton…
Inflaton versus Curvaton in Higher Dimensional Gauge Theories
Takeo Inami, Yoji Koyama, Chia-Min Lin +1
We construct a model of cosmological inflation and perturbation based on the higher-dimensional gauge theory. The inflaton and curvaton are the scalar fields arising from the extra…
Higgs-Inflaton Potential in Higher-Dimensional SUSY Gauge Theories
Takeo Inami, Yoji Koyama, C. S. Lim +1
We study the possibility that the Higgs and the inflaton are the same single field or cousins arising from the extra space components of some higher-dimensional gauge field. We tak…