208 citations · 1.2k across the 28 of their papers we have counts for
28 papers
Bumpy inflation from explosive particle production
Kaloian D. Lozanov, Xavier Pritchard, Misao Sasaki
We present a first-principles derivation of an effective inflaton potential with a bumpy feature. We consider the coupling of a spectator field χto the inflaton ϕsuch that χis mass…
Constraining the inflaton potential with gravitational waves from oscillons
Kaloian D. Lozanov, Misao Sasaki, Jan Tränkle
Under certain conditions, the oscillating inflaton condensate filling the Universe after inflation can fragment and form so-called oscillons. These long-lived soliton-like field co…
Dark matter from inflationary quantum fluctuations
Mohammad Ali Gorji, Misao Sasaki, Teruaki Suyama
We explore a scenario in which dark matter is a massive bosonic field, arising solely from quantum fluctuations generated during inflation. In this framework, dark matter exhibits…
Crunch from AdS bubble collapse in unbounded potentials
Kaloian D. Lozanov, Misao Sasaki
We consider a scalar field theory with a Minkowski false vacuum and an unbounded (or very deep) true vacuum. We show compelling evidence that an AdS bubble of vanishing total energ…
Probing Primordial Black Hole Scenarios with Terrestrial Gravitational Wave Detectors
Guillem Domènech, Misao Sasaki
It is possible that primordial black holes consitute (or consituted) a significant fraction of the energy budget of our universe. Terrestrial gravitational wave detectors offer the…
One-loop thermal radiation exchange in gravitational wave power spectrum
Atsuhisa Ota, Misao Sasaki, Yi Wang
The radiation-dominated universe is a key ingredient of the standard Big Bang cosmology. Radiation comprises numerous quantum elementary particles, and the macroscopic behavior of…