242 citations · 2.1k across the 39 of their papers we have counts for
39 papers
Prospects of detection of subsolar mass primordial black hole and white dwarf binary mergers
Takahiro S. Yamamoto, Ryoto Inui, Yuichiro Tada +1
The subsolar mass primordial black hole (PBH) attracts attention as robust evidence of its primordial origin against the astrophysical black hole. Not only with themselves, PBHs ca…
Primordial Black Holes and Induced Gravitational Waves from a Smooth Crossover beyond Standard Model
Albert Escrivà, Yuichiro Tada, Chul-Moon Yoo
Gravitational waves (GWs) induced by primordial fluctuations can be affected by the modification of the sound speed and the equation of state parameter once the c…
Cancellation of quantum corrections on the soft curvature perturbations
Yuichiro Tada, Takahiro Terada, Junsei Tokuda
We study the cancellation of quantum corrections on the superhorizon curvature perturbations from subhorizon physics beyond the single-clock inflation from the viewpoint of the cos…
Translating nano-Hertz gravitational wave background into primordial perturbations taking account of the cosmological QCD phase transition
Katsuya T. Abe, Yuichiro Tada
The evidence of the nano-Hertz stochastic gravitational wave (GW) background is reported by multiple pulsar timing array collaborations. While a prominent candidate of the origin i…
Stochastic dynamics of multi-waterfall hybrid inflation and formation of primordial black holes
Yuichiro Tada, Masaki Yamada
We show that a hybrid inflation model with multiple waterfall fields can result in the formation of primordial black hole (PBH) with an astrophysical size, by using an advanced alg…
On the primordial black hole formation in hybrid inflation
Yuichiro Tada, Masaki Yamada
We revisit the scenario of primordial black hole (PBH) formation from large curvature perturbations generated during the waterfall phase transition in hybrid inflation models. In a…