59 citations · 156 across the 12 of their papers we have counts for
3 papers · 1 filter
Stochastic gravitational wave background anisotropies from inflation with non-Bunch-Davies states
Shingo Akama, Shin'ichi Hirano, Shuichiro Yokoyama
It is known that stochastic gravitational wave backgrounds (SGWBs) have anisotropies generated by squeezed-type tensor non-Gaussianities originating from scalar-tensor-tensor (STT)…
Towards testing the general bounce cosmology with the CMB B-mode auto-bispectrum
Shingo Akama, Giorgio Orlando, Paola C. M. Delgado
It has been shown that a three-point correlation function of tensor perturbations from a bounce model in general relativity with a minimally-coupled scalar field is highly suppress…
Parity violation in primordial tensor non-Gaussianities from matter bounce cosmology
Shingo Akama, Mian Zhu
It has been shown that primordial tensor non-Gaussianities from a cubic Weyl action with a non-dynamical coupling are suppressed by the so-called slow-roll parameter in a conventio…