101 citations · 163 across the 6 of their papers we have counts for
6 papers
Nonlinear Independent Component Analysis Scheme and its application to gravitational wave data analysis
Jun'ya Kume, Koh Ueno, Tatsuki Washimi +3
Noise subtraction is a crucial process in gravitational wave (GW) data analysis to improve the sensitivity of interferometric detectors. While linear noise coupling has been extens…
Inflationary background renormalization
Jason Kristiano, Jun'ichi Yokoyama
In cosmic inflation, non-linearities of the curvature perturbation can induce backreaction to the background. To obtain observational predictions at non-linear order on the correct…
Generating large primordial fluctuations in single-field inflation for PBH formation
Jason Kristiano, Jun'ichi Yokoyama
In order to produce appreciable amount of primordial black holes (PBHs), the square amplitude of curvature perturbation must take a large value of , namely, seve…
Comparing sharp and smooth transitions of the second slow-roll parameter in single-field inflation
Jason Kristiano, Jun'ichi Yokoyama
In single-field inflation, violation of the slow-roll approximation can lead to growth of curvature perturbation outside the horizon. This violation is characterized by a period wi…
Identifying the most crucial parameters of the initial curvature profile for primordial black hole formation
Tomohiro Nakama, Tomohiro Harada, A. G. Polnarev +1
Primordial black holes (PBHs) are an important tool in cosmology to probe the primordial spectrum of small-scale curvature perturbations that reenter the cosmological horizon durin…
Constraining the time variation of the coupling constants from cosmic microwave background: effect of Λ_{QCD}
Masahiro Nakashima, Kazuhide Ichikawa, Ryo Nagata +1
We investigate constraints on the time variation of the fine structure constant between the recombination epoch and the present epoch, Δα/α\equiv (α_{rec} - α_{now})/α_{now}, from…