Publications (179)
f(R) gravity on non-linear scales: The post-Friedmann expansion and the vector potential
Daniel B Thomas, Marco Bruni, Kazuya Koyama +2
Galileons and strong gravity
Javier Chagoya, Kazuya Koyama, Gustavo Niz +1
Non-Gaussianity of quantum fields during inflation
Kazuya Koyama
Weak lensing predictions for coupled dark energy cosmologies at non-linear scales
Emma Beynon, Marco Baldi, David J. Bacon +2
Induced gravity on intersecting brane-worlds Part I: Maximally symmetric solutions
Olindo Corradini, Kazuya Koyama, Gianmassimo Tasinato
Self-Accelerating Universe in Galileon Cosmology
Fabio P Silva, Kazuya Koyama
Analytic solutions in non-linear massive gravity
Kazuya Koyama, Gustavo Niz, Gianmassimo Tasinato
Baryon Isocurvature Perturbation in the Affleck-Dine Baryogenesis mechanism
Kazuya Koyama, Jiro Soda
Galaxy bias and gauges at second order in General Relativity
Daniele Bertacca, Nicola Bartolo, Marco Bruni +5
Effective theory for the Vainshtein mechanism from the Horndeski action
Kazuya Koyama, Gustavo Niz, Gianmassimo Tasinato
Constraints on a non-gaussian ($Ï_m^2$) CDM model
Kazuya Koyama, Jiro Soda, Atsushi Taruya
Consistency test of general relativity from large scale structure of the Universe
Yong-Seon Song, Kazuya Koyama
Coupled bulk and brane fields about a de Sitter brane
Antonio Cardoso, Kazuya Koyama, Andrew Mennim +2
Brane-world inflation: slow-roll corrections to the spectral index
Kazuya Koyama, Andrew Mennim, David Wands
Strong interactions and exact solutions in non-linear massive gravity
Kazuya Koyama, Gustavo Niz, Gianmassimo Tasinato
Orthogonal non-Gaussianity in DBI Galileon: prospect for Planck polarisation and post-Planck experiments
Kazuya Koyama, Guido Walter Pettinari, Shuntaro Mizuno +1
Cosmological constant and gravitational theory on D-brane
Tetsuya Shiromizu, Kazuya Koyama, Takashi Torii
Enhanced gravitational scattering from large extra dimensions
Kazuya Koyama, Federico Piazza, David Wands
Consistent Modified Gravity Analysis of Anisotropic Galaxy Clustering Using BOSS DR11
Yong-Seon Song, Atsushi Taruya, Eric Linder +6
The cosmological constant and dark energy in braneworlds
Kazuya Koyama
A relativistic signature in large-scale structure
Nicola Bartolo, Daniele Bertacca, Marco Bruni +6
Are there ghosts in the self-accelerating brane universe?
Kazuya Koyama
Covariantised Vector Galileons
Matthew Hull, Kazuya Koyama, Gianmassimo Tasinato
Creation of an Open Universe from Valley Bounce
Kazuya Koyama, Kayoko Maeda, Jiro Soda
The extended Baryon Oscillation Spectroscopic Survey (eBOSS): a cosmological forecast
Gong-Bo Zhao, Yuting Wang, Ashley J. Ross +28
Low energy effective action on a self-gravitating D-brane
Sumitada Onda, Tetsuya Shiromizu, Kazuya Koyama +1
Speeding up $N$-body simulations of modified gravity: Chameleon screening models
Sownak Bose, Baojiu Li, Alexandre Barreira +5
Quantum Fluctuations of Bulk Inflaton in Inflationary Brane World
Shinpei Kobayashi, Kazuya Koyama, Jiro Soda
Non-linear Evolution of Matter Power Spectrum in Modified Theory of Gravity
Kazuya Koyama, Atsushi Taruya, Takashi Hiramatsu
Evolution of gravitational waves in the high-energy regime of brane-world cosmology
Takashi Hiramatsu, Kazuya Koyama, Atsushi Taruya
Primordial perturbations from slow-roll inflation on a brane
Kazuya Koyama, Andrew Mennim, V. A. Rubakov +2
Non-Gaussianities in DBI inflation with angular motion
Taichi Kidani, Kazuya Koyama
More on ghosts in DGP model
Dmitry Gorbunov, Kazuya Koyama, Sergei Sibiryakov
Simulation tests of galaxy cluster constraints on chameleon gravity
Harry Wilcox, Robert C. Nichol, Gong-bo Zhao +3
Exploring Vainshtein mechanism on adaptively refined meshes
Baojiu Li, Gong-Bo Zhao, Kazuya Koyama
Inflaton perturbations in brane-world cosmology with induced gravity
Kazuya Koyama, Shuntaro Mizuno
Brane induced gravity from asymmetric warped compactification
Kazuya Koyama, Kayoko Koyama
Trispectrum estimation in various models of equilateral type non-Gaussianity
Keisuke Izumi, Shuntaro Mizuno, Kazuya Koyama
The DESI Experiment Part II: Instrument Design
DESI Collaboration, Amir Aghamousa, Jessica Aguilar +290
Moduli instability in warped compactification - 4D effective theory approach
Frederico Arroja, Kazuya Koyama
Novel Probes of Gravity and Dark Energy
Bhuvnesh Jain, Austin Joyce, Rodger Thompson +29
Testing General Relativity using the Environmental Dependence of Dark Matter Halos
Gong-Bo Zhao, Baojiu Li, Kazuya Koyama
Low energy effective theory on a regularized brane in 6D gauged chiral supergravity
Frederico Arroja, Tsutomu Kobayashi, Kazuya Koyama +1
Chameleon f(R) gravity in the virialized cluster
Lucas Lombriser, Kazuya Koyama, Gong-Bo Zhao +1
Revealing modified gravity signal in matter and halo hierarchical clustering
Wojciech A. Hellwing, Kazuya Koyama, Benjamin Bose +1
Encyclopaedia Curvatonis
Vincent Vennin, Kazuya Koyama, David Wands
Signature of Primordial Non-Gaussianity on Matter Power Spectrum
Atsushi Taruya, Kazuya Koyama, Takahiko Matsubara
Redshift space distortions in f(R) gravity
Elise Jennings, Carlton M. Baugh, Baojiu Li +2
Trispectrum estimator in equilateral type non-Gaussian models
Shuntaro Mizuno, Kazuya Koyama
Slow-roll corrections to inflaton fluctuations on a brane
Kazuya Koyama, Shuntaro Mizuno, David Wands
Thick Brane Worlds and Their Stability
Shinpei Kobayashi, Kazuya Koyama, Jiro Soda
Regularized cosmological power spectrum and correlation function in modified gravity models
Atsushi Taruya, Takahiro Nishimichi, Francis Bernardeau +2
Relativistic initial conditions for N-body simulations
Christian Fidler, Thomas Tram, Cornelius Rampf +3
Primordial fluctuations in bulk inflaton model
Kazuya Koyama, Keitaro Takahashi
Diagrammatic approach to non-Gaussianity from inflation
Christian T. Byrnes, Kazuya Koyama, Misao Sasaki +1
The Distinguishability of Interacting Dark Energy from Modified Gravity
Timothy Clemson, Kazuya Koyama
Lattice Boltzmann modeling and simulation of liquid jet breakup
Shimpei Saito, Yutaka Abe, Kazuya Koyama
Cosmological Perturbations in Brane World - Brane view v.s. Bulk view -
Jiro Soda, Kazuya Koyama
Complementarity of Weak Lensing and Peculiar Velocity Measurements in Testing General Relativity
Yong-Seon Song, Gong-Bo Zhao, David Bacon +3
Equivalence Principle Violation in Vainshtein Screened Two-Body Systems
Takashi Hiramatsu, Wayne Hu, Kazuya Koyama +1
The role of vector fields in modified gravity scenarios
Gianmassimo Tasinato, Kazuya Koyama, Nima Khosravi
The nonlinear matter and velocity power spectra in f(R) gravity
Baojiu Li, Wojciech A. Hellwing, Kazuya Koyama +3
Unexorcized ghost in DGP brane world
Keisuke Izumi, Kazuya Koyama, Takahiro Tanaka
Testing chameleon gravity with the Coma cluster
Ayumu Terukina, Lucas Lombriser, Kazuhiro Yamamoto +3
Degenerate higher order scalar-tensor theories beyond Horndeski up to cubic order
Jibril Ben Achour, Marco Crisostomi, Kazuya Koyama +3
Can we live on a D-brane? -- Effective theory on a self-gravitating D-brane --
Tetsuya Shiromizu, Kazuya Koyama, Sumitada Onda +1
Quantization of scalar perturbations in brane-world inflation
Hiroyuki Yoshiguchi, Kazuya Koyama
A Perturbative Approach to the Redshift Space Correlation Function: Beyond the Standard Model
Benjamin Bose, Kazuya Koyama
Evolution of gravitational waves from inflationary brane-world : numerical study of high-energy effects
Takashi Hiramatsu, Kazuya Koyama, Atsushi Taruya
Effective theory for close limit of two branes
Tetsuya Shiromizu, Kazuya Koyama, Keitaro Takahashi
Observational signatures of the theories beyond Horndeski
Antonio De Felice, Kazuya Koyama, Shinji Tsujikawa
Scale Dependence of Halo Bispectrum from Non-Gaussian Initial Conditions in Cosmological N-body Simulations
Takahiro Nishimichi, Atsushi Taruya, Kazuya Koyama +1
ECOSMOG: An Efficient Code for Simulating Modified Gravity
Baojiu Li, Gong-Bo Zhao, Romain Teyssier +1
Numerical study of curvature perturbations in a brane-world inflation at high-energies
Takashi Hiramatsu, Kazuya Koyama
Modified Gravity N-body Code Comparison Project
Hans A. Winther, Fabian Schmidt, Alexandre Barreira +12
General relativistic corrections to $N$-body simulations and the Zel'dovich approximation
Christian Fidler, Cornelius Rampf, Thomas Tram +3
Cosmology of bigravity with doubly coupled matter
Denis Comelli, Marco Crisostomi, Kazuya Koyama +2
Primordial non-Gaussianity from the DBI Galileons
Shuntaro Mizuno, Kazuya Koyama
Beyond consistency test of gravity with redshift-space distortions at quasi-linear scales
Atsushi Taruya, Kazuya Koyama, Takashi Hiramatsu +1
Induced gravity on intersecting brane-worlds Part II: Cosmology
Olindo Corradini, Kazuya Koyama, Gianmassimo Tasinato
N-body Simulations for f(R) Gravity using a Self-adaptive Particle-Mesh Code
Gong-Bo Zhao, Baojiu Li, Kazuya Koyama
Curvature perturbations from ekpyrotic collapse with multiple fields
Kazuya Koyama, Shuntaro Mizuno, David Wands
Cosmological tests of General Relativity: a principal component analysis
Alireza Hojjati, Gong-Bo Zhao, Levon Pogosian +3
A new line-of-sight approach to the non-linear Cosmic Microwave Background
Christian Fidler, Kazuya Koyama, Guido W. Pettinari
New symmetries in Fierz-Pauli massive gravity
Gianmassimo Tasinato, Kazuya Koyama, Gustavo Niz
Cosmological Perturbations in Inflationary Models with Anisotropic Space-Time Scaling in Lifshitz Background
Mohsen Alishahiha, Hassan Firouzjahi, Kazuya Koyama +1
Disentangling non-Gaussianity, bias and GR effects in the galaxy distribution
Marco Bruni, Robert Crittenden, Kazuya Koyama +3
The Intrinsic Matter Bispectrum in $Î$CDM
Thomas Tram, Christian Fidler, Robert Crittenden +3
Structure formation in the DGP cosmological model
Kazuya Koyama, Roy Maartens
Relativistic corrections and non-Gaussianity in radio continuum surveys
Roy Maartens, Gong-Bo Zhao, David Bacon +2
Relativistic effects in galaxy clustering in a parametrized post-Friedmann universe
Lucas Lombriser, Jaiyul Yoo, Kazuya Koyama
Cosmological matching conditions for gravitational waves at second order
Frederico Arroja, Hooshyar Assadullahi, Kazuya Koyama +1
Coupled boundary and bulk fields in anti-de Sitter
Kazuya Koyama, Andrew Mennim, David Wands
Gravitational backreaction of anti-D branes in the warped compactification
Kayoko Koyama, Kazuya Koyama
Stable cosmology in ghost-free quasidilaton theory
A. Emir Gumrukcuoglu, Kazuya Koyama, Shinji Mukohyama
COLA with massive neutrinos
Bill S. Wright, Hans A. Winther, Kazuya Koyama
Weak lensing predictions for modified gravities at non-linear scales
Emma Beynon, David J. Bacon, Kazuya Koyama
The intrinsic B-mode polarisation of the Cosmic Microwave Background
Christian Fidler, Guido W. Pettinari, Martin Beneke +3
Horndeski: beyond, or not beyond?
Marco Crisostomi, Matthew Hull, Kazuya Koyama +1
Relativistic Interpretation of Newtonian Simulations for Cosmic Structure Formation
Christian Fidler, Thomas Tram, Cornelius Rampf +3