49 citations · 55 across the 8 of their papers we have counts for
9 papers
Adding electromagnetic birefringence to pulsar timing and astrometry to detect gravitational waves
Keisuke Inomata, Marc Kamionkowski
It was recently shown that the time variation of the polarization of electromagnetic waves from pulsars can be used, in cross-correlation with pulsar timing, to probe the chirality…
Note on pulsar timing array correlation functions induced by peculiar velocities
Neha Anil Kumar, Keisuke Inomata, Marc Kamionkowski
Several papers have recently calculated the contribution to pulsar timing array overlap reduction functions (ORFs) induced by our peculiar velocity with respect to the rest frame o…
Gravitational Waves from Particles Produced from Bubble Collisions in First-Order Phase Transitions
Keisuke Inomata, Marc Kamionkowski, Kentaro Kasai +1
We discuss a new source of gravitational waves (GWs) from first-order phase transitions. The collisions of bubbles of the new phase can efficiently produce particles that couple to…
Constraints on the Sharpness of the Curvature Power Spectrum
Keisuke Inomata, Xuheng Luo
Motivated by the fact that a sharply peaked curvature spectrum is often considered in the literature, we examine theoretical constraints on the sharpness of such a spectrum. In par…
Parity-breaking galaxy 4-point function from lensing by chiral gravitational waves
Keisuke Inomata, Leah Jenks, Marc Kamionkowski
Recent searches for parity breaking in the galaxy four-point correlation function, as well as the prospects for greatly improved sensitivity to parity breaking in forthcoming surve…
Overlap reduction functions for pulsar timing arrays and astrometry
Keisuke Inomata, Marc Kamionkowski, Celia M. Toral +1
We present an efficient technique for calculating the angular two-point correlation functions (or ``overlap reduction functions'') induced by gravitational waves in both the pulse…
Inflationary Butterfly Effect: Non-perturbative Dynamics From Small-Scale Features
Angelo Caravano, Keisuke Inomata, Sébastien Renaux-Petel
For the first time, we investigate the non-perturbative dynamics of single field inflation with a departure from slow-roll. Using simulations, we find that oscillatory features in…
Superhorizon Curvature Perturbations Are Protected against One-Loop Corrections
Keisuke Inomata
We examine one-loop corrections from small-scale curvature perturbations to the superhorizon-limit ones in single-field inflation models, which have recently caused controversy. We…
Induced Gravitational Waves with Kination Era for Recent Pulsar Timing Array Signals
Keisuke Harigaya, Keisuke Inomata, Takahiro Terada
The evidence of the stochastic gravitational-wave background around the nano-hertz frequency range was recently found by worldwide pulsar timing array (PTA) collaborations. One of…