Yukawa Institute for Theoretical Physics

output

19912026

most citedReheating after Inflation

1.8k citations

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions

Showing 2018 · astro-ph.COShow all

21 papers · 2 filters

astro-ph.CO2018★ 157 cited

Primordial Black Holes and Local Non-Gaussianity in Canonical Inflation

Samuel Passaglia, Wayne Hu, Hayato Motohashi

Primordial black holes (PBHs) cannot be produced abundantly enough to be the dark matter in canonical single-field inflation under slow roll. This conclusion is robust to local non…

astro-ph.CO2018★ 12 cited

Bounds from ISW-galaxy cross-correlations on generalized covariant Galileon models

Francesco Giacomello, Antonio De Felice, Stefano Ansoldi

Several modified cosmological models exist, which also try to address the tensions between data and predictions of the $Λ$ -CDM model. Galileon models are particular scalar tensor t…

astro-ph.CO2018★ 208 cited

Dark Quest. I. Fast and Accurate Emulation of Halo Clustering Statistics and Its Application to Galaxy Clustering

Takahiro Nishimichi, Masahiro Takada, Ryuichi Takahashi +8

We perform an ensemble of $N$ -body simulations with $204 8^{3}$ particles for 101 flat $w$ CDM cosmological models sampled based on a maximin-distance Sliced Latin Hypercube Design. By…

astro-ph.CO2018★ 29 cited

Constraints on massive vector dark energy models from integrated Sachs-Wolfe-galaxy cross-correlations

Shintaro Nakamura, Antonio De Felice, Ryotaro Kase +1

The gravitational-wave event GW170817, together with the electromagnetic counterpart, shows that the speed of tensor perturbations $c_{T}$ on the cosmological background is very clos…

astro-ph.CO2018★ 61 cited

Effect of Inhomogeneity on Primordial Black Hole Formation in the Matter Dominated Era

Takafumi Kokubu, Koutarou Kyutoku, Kazunori Kohri +1

We investigate the effect of inhomogeneity on primordial black hole formation in the matter dominated era. In the gravitational collapse of an inhomogeneous density distribution, a…

astro-ph.CO2018★ 442 cited

Gravitational Waves Induced by non-Gaussian Scalar Perturbations

Rong-gen Cai, Shi Pi, Misao Sasaki

We study gravitational waves (GWs) induced by non-Gaussian curvature perturbations. We calculate the density parameter per logarithmic frequency interval, $Ω_{GW} (k)$ , given t…

astro-ph.CO2018★ 31 cited

Perturbation theory challenge for cosmological parameters estimation: Matter power spectrum in real space

Ken Osato, Takahiro Nishimichi, Francis Bernardeau +1

We study the accuracy with which cosmological parameters can be determined from real space power spectrum of matter density contrast at weakly nonlinear scales using analytical app…

astro-ph.CO2018★ 42 cited

The one-loop matter bispectrum as a probe of gravity and dark energy

Benjamin Bose, Atsushi Taruya

Gravity-induced non-Gaussianity in the large-scale structure of the Universe, characterised by higher-order statistics such as the bispectrum (three-point cumulant), is expected to…

astro-ph.CO2018★ 52 cited

GridSPT: Grid-based calculation for perturbation theory of large-scale structure

Atsushi Taruya, Takahiro Nishimichi, Donghui Jeong

Perturbation theory (PT) calculation of large-scale structure has been used to interpret the observed non-linear statistics of large-scale structure at the quasi-linear regime. In…

astro-ph.CO2018★ 26 cited

Limits on primordial magnetic fields from direct detection experiments of gravitational wave background

Shohei Saga, Hiroyuki Tashiro, Shuichiro Yokoyama

Primordial magnetic fields (PMFs) can source gravitational wave background (GWB). In this paper, we investigate the possible constraints on small-scale PMF considering the ongoing…

astro-ph.CO2018★ 7 cited

Quantum Entanglement in Multi-field Inflation

Nadia Bolis, Tomohiro Fujita, Shuntaro Mizuno +1

We study the emergence of quantum entanglement in multi-field inflation. In this scenario, the perturbations of one field contribute to the observable curvature perturbation, while…

astro-ph.CO2018★ 20 cited

Single-Field Consistency relation and $δ N$ -Formalism

Ali Akbar Abolhasani, Misao Sasaki

According to the equivalence principal, the long wavelength perturbations must not have any dynamical effect on the short scale physics up to $O (k_{L}^{2} / k_{s}^{2})$ . Their effect…

astro-ph.CO2018★ 30 cited

Lagrangian cosmological perturbation theory at shell-crossing

Shohei Saga, Atsushi Taruya, Stéphane Colombi

We consider the growth of primordial dark matter halos seeded by three crossed initial sine waves of various amplitudes. Using a Lagrangian treatment of cosmological gravitational…

astro-ph.CO2018★ 20 cited

Integrated Sachs-Wolfe-galaxy cross-correlation bounds on the two branches of the minimal theory of massive gravity

Nadia Bolis, Antonio De Felice, Shinji Mukohyama

The minimal theory of massive gravity (MTMG) has two branches of stable cosmological solutions: a self-accelerating branch, which, except for the mass of tensor modes has exactly t…

astro-ph.CO2018★ 60 cited

Imprints of relativistic effects on the asymmetry of the halo cross-correlation function: from linear to non-linear scales

Michel-Andrès Breton, Yann Rasera, Atsushi Taruya +2

The apparent distribution of large-scale structures in the universe is sensitive to the velocity/potential of the sources as well as the potential along the line-of-sight through t…

astro-ph.CO2018★ 17 cited

Reconstruction of primordial tensor power spectra from B-mode polarization of the cosmic microwave background

Takashi Hiramatsu, Eiichiro Komatsu, Masashi Hazumi +1

Given observations of B-mode polarization power spectrum of the cosmic microwave background (CMB), we can reconstruct power spectra of primordial tensor modes from the early Univer…

astro-ph.CO2018★ 9 cited

Reconciling tensor and scalar observables in G-inflation

Héctor Ramírez, Samuel Passaglia, Hayato Motohashi +2

The simple $m^{2} ϕ^{2}$ potential as an inflationary model is coming under increasing tension with limits on the tensor-to-scalar ratio $r$ and measurements of the scalar spectral inde…

astro-ph.CO2018★ 823 cited

Primordial Black Holes - Perspectives in Gravitational Wave Astronomy -

Misao Sasaki, Teruaki Suyama, Takahiro Tanaka +1

This is a review article on the primordial black holes (PBHs), with particular focus on the massive ones ( $≳ 1 0^{15} g$ ) which have not evaporated by the present epoch b…

astro-ph.CO2018★ 14 cited

Hybrid modeling of redshift space distortions

Yong-Seon Song, Yi Zheng, Atsushi Taruya +1

The observed power spectrum in redshift space appears distorted due to the peculiar motion of galaxies, known as redshift-space distortions (RSD). While all the effects in RSD are…