Ryo Nagata

TL;DR: LiteBIRD as mentioned in this paper is a next-generation satellite mission to measure the polarization of the cosmic microwave background (CMB) radiation, which carries the imprint of primordial gravitational waves.

TL;DR: In this paper, the authors show that the Coleman-Weinberg model can induce double inflation and formation of primordial black holes (PBHs), because fluctuations that leave the horizon near the end of first inflation are anomalously enhanced at the onset of second inflation.

TL;DR: LiteBIRD as discussed by the authors , a satellite for the study of B-mode polarization and inflation from cosmic background radiation detection, is a space mission for primordial cosmology and fundamental physics, which is planned to orbit the Sun-Earth Lagrangian point L2, where it will map the cosmic microwave background (CMB) polarization over the entire sky for three years, with three telescopes in 15 frequency bands between 34 and 448 GHz, achieving an unprecedented total sensitivity of 2.2

TL;DR: In this paper, the authors show that the Coleman-Weinberg model can induce double inflation and formation of primordial black holes (PBHs), because fluctuations that leave the horizon near the end of first inflation are anomalously enhanced at the onset of second inflation when the time-dependent mode turns to a growing mode rather than a decaying mode.

TL;DR: In this paper, a Markov chain Monte-Carlo analysis was performed to search for possible modulations in the power spectrum and determine its shape together with the cosmological parameters using cosmic microwave background radiation data.