Publications (143)
Evolution of the Pairwise Peculiar Velocity Distribution Function in Lagrangian Perturbation Theory
Naoki Seto, Jun'ichi Yokoyama
Supermassive black holes formed by direct collapse of inflationary perturbations
Tomohiro Nakama, Teruaki Suyama, Jun'ichi Yokoyama
Dynamics of Subcritical Bubbles in First Order Phase Transition
Tetsuya Shiromizu, Masahiro Morikawa, Jun'ichi Yokoyama
Primordial non-Gaussianities of gravitational waves in the most general single-field inflation model
Xian Gao, Tsutomu Kobayashi, Masahide Yamaguchi +1
Primordial Spikes from Wrapped Brane Inflation
Takeshi Kobayashi, Jun'ichi Yokoyama
Probing reheating temperature of the universe with gravitational wave background
Kazunori Nakayama, Shun Saito, Yudai Suwa +1
Evolution of a global string network in a matter dominated universe
Masahide Yamaguchi, Jun'ichi Yokoyama, M. Kawasaki
Effects of thermal fluctuations on thermal inflation
Takashi Hiramatsu, Yuhei Miyamoto, Jun'ichi Yokoyama
Reheating the Universe Once More: The Dissipation of Acoustic Waves as a Novel Probe of Primordial Inhomogeneities on Even Smaller Scales
Tomohiro Nakama, Teruaki Suyama, Jun'ichi Yokoyama
Cosmic Inversion II --An iterative method for reproducing the primordial spectrum from the CMB data--
Makoto Matsumiya, Misao Sasaki, Jun'ichi Yokoyama
Fermionic Schwinger effect and induced current in de Sitter space
Takahiro Hayashinaka, Tomohiro Fujita, Jun'ichi Yokoyama
Numerical analysis of formation and evolution of global strings in 2+1 dimensions
Masahide Yamaguchi, Jun'ichi Yokoyama, M. Kawasaki
Future Oscillations around Phantom Divide in f(R) Gravity
Hayato Motohashi, Alexei A. Starobinsky, Jun'ichi Yokoyama
Equation of state of dark energy in f(R) gravity
Kazufumi Takahashi, Jun'ichi Yokoyama
Constraining Cosmological Parameters by the Cosmic Inversion Method
Noriyuki Kogo, Misao Sasaki, Jun'ichi Yokoyama
Reconstructing the Primordial Spectrum with CMB Temperature and Polarization
Noriyuki Kogo, Misao Sasaki, Jun'ichi Yokoyama
New cosmological constraints on primordial black holes
B. J. Carr, Kazunori Kohri, Yuuiti Sendouda +1
Neutralino Dark Matter from Heavy Gravitino Decay
Kazunori Kohri, Masahiro Yamaguchi, Jun'ichi Yokoyama
Density fluctuations in Brans-Dicke inflation
Alexei A. Starobinsky, Jun'ichi Yokoyama
Gravitino Dark Matter and Non-Gaussianity
Tomo Takahashi, Masahide Yamaguchi, Jun'ichi Yokoyama +1
Analytic solution for matter density perturbations in a class of viable cosmological f(R) models
Hayato Motohashi, Alexei A. Starobinsky, Jun'ichi Yokoyama
Toward the detection of gravitational waves under non-Gaussian noises II. Independent Component Analysis
Soichiro Morisaki, Jun'ichi Yokoyama, Kazunari Eda +1
Constraining the time variation of the coupling constants from cosmic microwave background: effect of Î_{QCD}
Masahiro Nakashima, Kazuhide Ichikawa, Ryo Nagata +1
Cosmological perturbations from multi-field inflation in generalized Einstein theories
Alexei A. Starobinsky, Shinji Tsujikawa, Jun'ichi Yokoyama
Point splitting renormalization of Schwinger induced current in de Sitter spacetime
Takahiro Hayashinaka, Jun'ichi Yokoyama
Topological $R^4$ Inflation
John Ellis, Nemanja Kaloper, Keith A. Olive +1
Gravitational modulated reheating and non-Gaussianity in Supergravity R^2 inflation
Yuki Watanabe, Jun'ichi Yokoyama
On the Jeans Instability During the QCD Phase Transition
Michiyasu Nagasawa, Jun'ichi Yokoyama
Generalized Higgs inflation
Kohei Kamada, Tsutomu Kobayashi, Tomo Takahashi +2
Is Warm Inflation Possible?
Jun'ichi Yokoyama, Andrei Linde
Possible resolution of the domain wall problem in the NMSSM
Anupam Mazumdar, Ken'ichi Saikawa, Masahide Yamaguchi +1
Constraints on moduli cosmology from the production of dark matter and baryon isocurvature fluctuations
Martin Lemoine, Jerome Martin, Jun'ichi Yokoyama
Production and dilution of gravitinos by modulus decay
Kazunori Kohri, Masahiro Yamaguchi, Jun'ichi Yokoyama
Temporal enhancement of super-horizon curvature perturbations from decays of two curvatons and its cosmological consequences
Teruaki Suyama, Jun'ichi Yokoyama
Generalized G-inflation: Inflation with the most general second-order field equations
Tsutomu Kobayashi, Masahide Yamaguchi, Jun'ichi Yokoyama
Weighing neutrinos in the presence of a running primordial spectral index
Bo Feng, Jun-Qing Xia, Jun'ichi Yokoyama +2
Reconstructing the Primordial Spectrum from WMAP Data by the Cosmic Inversion Method
Noriyuki Kogo, Makoto Matsumiya, Misao Sasaki +1
Note on Reheating in G-inflation
Hossein Bazrafshan Moghaddam, Robert Brandenberger, Jun'ichi Yokoyama
Metric perturbation from inflationary magnetic field and generic bound on inflation models
Teruaki Suyama, Jun'ichi Yokoyama
Gravitational-Wave Constraints on the Abundance of Primordial Black Holes
Ryo Saito, Jun'ichi Yokoyama
Higgsflation at the GUT scale in a Higgsless Universe
Nemanja Kaloper, Lorenzo Sorbo, Jun'ichi Yokoyama
Single-field inflation, anomalous enhancement of superhorizon fluctuations, and non-Gaussianity in primordial black hole formation
Ryo Saito, Jun'ichi Yokoyama, Ryo Nagata
Phantom boundary crossing and anomalous growth index of fluctuations in viable f(R) models of cosmic acceleration
Hayato Motohashi, Alexei A. Starobinsky, Jun'ichi Yokoyama
What happens when the inflaton stops during inflation
Osamu Seto, Jun'ichi Yokoyama, Hideo Kodama
Probing the star formation epoch with Wilkinson Microwave Anisotropy Probe (WMAP) data and high-redshift QSOs
Jun'ichi Yokoyama
Matter power spectrum in f(R) gravity with massive neutrinos
Hayato Motohashi, Alexei A. Starobinsky, Jun'ichi Yokoyama
The moduli problem at the perturbative level
Martin Lemoine, Jerome Martin, Jun'ichi Yokoyama
Density fluctuations in one-field inflation
Masahide Yamaguchi, Jun'ichi Yokoyama
Evolution of Axionic Strings and Spectrum of Axions Radiated from Them
Masahide Yamaguchi, M. Kawasaki, Jun'ichi Yokoyama
G-inflation: inflation driven by the Galileon field
Tsutomu Kobayashi, Masahide Yamaguchi, Jun'ichi Yokoyama
Power Spectrum of the Density Perturbations From Smooth Hybrid New Inflation Model
Masahiro Kawasaki, Tsutomu Takayama, Masahide Yamaguchi +1
Full bispectra from primordial scalar and tensor perturbations in the most general single-field inflation model
Xian Gao, Tsutomu Kobayashi, Maresuke Shiraishi +3
Graceful exit from Higgs G-inflation
Kohei Kamada, Tsutomu Kobayashi, Taro Kunimitsu +2
Band-power reconstruction of the primordial fluctuation spectrum by the maximum likelihood reconstruction method
Ryo Nagata, Jun'ichi Yokoyama
Probability Distribution Function of the Coarse-grained Scalar Field at Finite Temperature
Masahide Yamaguchi, Jun'ichi Yokoyama
Entropic interpretation of the Hawking-Moss bounce
Naritaka Oshita, Jun'ichi Yokoyama
Counts-in-cells analysis of the statistical distribution in an N-body simulated universe
Haruhiko Ueda, Jun'ichi Yokoyama
Consequences of a stochastic approach to the conformal invariance of inflationary correlators
Hayato Motohashi, Teruaki Suyama, Jun'ichi Yokoyama
Topological inflation induced by a non-minimally coupled massive scalar field
Nobuyuki Sakai, Jun'ichi Yokoyama
Constraints on primordial black holes from Galactic gamma-ray background
B. J. Carr, Kazunori Kohri, Yuuiti Sendouda +1
Effect of Void Network on CMB Anisotropy
Nobuyuki Sakai, Naoshi Sugiyama, Jun'ichi Yokoyama
On the origin of the cosmological constant
Jun'ichi Yokoyama
Phase transition and monopole production in supergravity inflation
Kohei Kamada, Kazunori Nakayama, Jun'ichi Yokoyama
Topological inflation from the Starobinsky model in supergravity
Kohei Kamada, Jun'ichi Yokoyama
Generation of Large-Scale Magnetic Fields in Single-Field Inflation
Jerome Martin, Jun'ichi Yokoyama
Higgs G-inflation
Kohei Kamada, Tsutomu Kobayashi, Masahide Yamaguchi +1
Thermal fluctuations in electroweak phase transition
Tetsuya Shiromizu, Masahiro Morikawa, Jun'ichi Yokoyama
The effect of varying sound velocity on primordial curvature perturbations
Masahiro Nakashima, Ryo Saito, Yu-ichi Takamizu +1
Phantom behaviour and growth index anomalous evolution in viable f(R) gravity models
Hayato Motohashi, Alexei A. Starobinsky, Jun'ichi Yokoyama
Scale dependence of the primordial spectrum from combining the three-year WMAP, Galaxy Clustering, Supernovae, and Lyman-alpha forests
Bo Feng, Jun-Qing Xia, Jun'ichi Yokoyama
Genus Statistics of the Large-Scale Structure with Non-Gaussian Density Fields
Takahiko Matsubara, Jun'ichi Yokoyama
New inflation in supergravity with a chaotic initial condition
Masahide Yamaguchi, Jun'ichi Yokoyama
Revisiting the oscillations in the CMB angular power spectra at $\ell\sim120$ in the Planck2015 data
Koichiro Horiguchi, Kiyotomo Ichiki, Jun'ichi Yokoyama
Improved estimation of radiated axions from cosmological axionic strings
Takashi Hiramatsu, Masahiro Kawasaki, Toyokazu Sekiguchi +2
Cosmology Based on f(R) Gravity Admits 1 eV Sterile Neutrinos
Hayato Motohashi, Alexei A. Starobinsky, Jun'ichi Yokoyama
Langevin description of gauged scalar fields in a thermal bath
Yuhei Miyamoto, Hayato Motohashi, Teruaki Suyama +1
Chaotic Inflation and Baryogenesis in Supergravity
Hitoshi Murayama, Hiroshi Suzuki, T. Yanagida +1
Formation of intermediate-mass black holes as primordial black holes in the inflationary cosmology with running spectral index
Toshihiro Kawaguchi, Masahiro Kawasaki, Tsutomu Takayama +2
Sample variance of the cosmic velocity field
Naoki Seto, Jun'ichi Yokoyama
Evading the pulsar constraints on the cosmic string tension in supergravity inflation
Kohei Kamada, Yuhei Miyamoto, Jun'ichi Yokoyama
Imprints of the Metrically-coupled Dilaton on Density Perturbations in Inflationary Cosmology
Takeshi Chiba, Naoshi Sugiyama, Jun'ichi Yokoyama
Cosmic strings with twisted magnetic flux lines and wound-strings in extra dimensions
Matthew Lake, Jun'ichi Yokoyama
Space laser interferometers can determine the thermal history of the early Universe
Kazunori Nakayama, Shun Saito, Yudai Suwa +1
Formation of MACHO-Primordial Black Holes in Inflationary Cosmology
Jun'ichi Yokoyama
Degenerate vacua as the origin of the dark energy
Jun'ichi Yokoyama
Self-consistent initial conditions for primordial black hole formation
A. G. Polnarev, Tomohiro Nakama, Jun'ichi Yokoyama
Cosmic Discordance: Detection of a modulation in the primordial fluctuation spectrum
Kiyotomo Ichiki, Ryo Nagata, Jun'ichi Yokoyama
f(R) Gravity and its Cosmological Implications
Hayato Motohashi, Alexei A. Starobinsky, Jun'ichi Yokoyama
Inflation and the dwarf galaxy problem
Jun'ichi Yokoyama
Numerical analysis of the dynamics of a cosmic string loop as a vortex
Michiyasu Nagasawa, Jun'ichi Yokoyama
Vacuum selection by inflation as the origin of the dark energy
Jun'ichi Yokoyama
Reconstruction of the primordial fluctuation spectrum from the five-year WMAP data by the cosmic inversion method with band-power decorrelation analysis
Ryo Nagata, Jun'ichi Yokoyama
Chaotic hybrid new inflation in supergravity with a running spectral index
Masahide Yamaguchi, Jun'ichi Yokoyama
Primordial Black Holes and Primordial Nucleosynthesis I: Effects of Hadron Injection from Low Mass Holes
K. Kohri, Jun'ichi Yokoyama
Cosmic Inversion: Reconstructing primordial spectrum from CMB anisotropy
Makoto Matsumiya, Misao Sasaki, Jun'ichi Yokoyama
Time variation of proton-electron mass ratio and fine structure constant with runaway dilaton
Takeshi Chiba, Tatsuo Kobayashi, Masahide Yamaguchi +1
Chaotic new inflation and formation of primordial black holes
Jun'ichi Yokoyama
Reheating signature in the gravitational wave spectrum from self-ordering scalar fields
Sachiko Kuroyanagi, Takashi Hiramatsu, Jun'ichi Yokoyama
Monopole Inflation in Brans-Dicke Theory
Nobuyuki Sakai, Jun'ichi Yokoyama, Kei-ichi Maeda
Gravitational Wave Background and Non-Gaussianity as a Probe of the Curvaton Scenario
Kazunori Nakayama, Jun'ichi Yokoyama