27 citations · 35 across the 6 of their papers we have counts for
7 papers
Reconciling Inflation with the Festina Lente Bound through Affleck-Dine Baryogenesis
Kazuto Nakamura, Masaki Yamada
The Festina-Lente bound is a swampland conjecture motivated by the behavior of charged BHs in dS spacetime, which imposes a constraint on the masses of charged particles. Although…
A Small-Throat Boundary Condition for the Tunneling Wave Function of the Universe
Masaki Yamada
We propose a small-throat prescription for the wave function of a closed universe in the Lorentzian path integral formalism, motivated by the idea that universe creation may be obt…
Delayed Scaling of Multi-Type Cosmic F- and D-strings in VOS Models
Kazuto Nakamura, Masaki Yamada
We investigate the velocity-dependent one-scale (VOS) model to the case of one cosmic F-string and two D-strings as color flux tubes in pure Spin() gauge theory. We analyticall…
A new regularization scheme for the wave function of the Universe in the Lorentzian path integral
Masaki Yamada
The Lorentzian path integral for the wave function of the Universe is only conditionally convergent and thus requires a well-defined prescription. The Picard-Lefschetz approach ens…
Analytic derivation of GW spectrum from bubble collisions in FLRW Universe
Masaki Yamada
We generalize the analytic formula for the gravitational-wave spectrum from bubble collisions during a cosmological first-order phase transition, under the thin-wall and envelope a…
Maximal GW amplitude from bubble collisions in supercooled phase transitions
Masaki Yamada
We extend analytic formulas for the gravitational-wave (GW) spectrum from first-order phase transitions to include cosmic expansion under the thin-wall and envelope approximations.…
Super-slow phase transition catalyzed by BHs and the birth of baby BHs
Ryusuke Jinno, Jun'ya Kume, Masaki Yamada
We discuss the unique phenomenology of first-order phase transitions catalyzed by primordial black holes (BHs). If the number of BHs within one Hubble volume is smaller than unity…