7 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…
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…