Super-slow phase transition catalyzed by BHs and the birth of baby BHs
Ryusuke Jinno (Research Center for the Early Universe (RESCEU), University of Tokyo, Bunkyo, Tokyo, Japan)
; Jun'ya Kume (Research Center for the Early Universe (RESCEU), University of Tokyo, Bunkyo, Tokyo, Japan, Dipartimento di Fisica e Astronomia “G. Galilei”, Università degli Studi di Padova, via Marzolo 8, Padova, Italy, INFN, Sezione di Padova, via Marzolo 8, Padova, Italy); Masaki Yamada (Department of Physics, Tohoku University, Sendai, Japan, FRIS, Tohoku University, Sendai, Japan)
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 at the time of bubble nucleation, each bubble catalyzed around them can expand to the Hubble size, and the universe is eventually filled with true vacuum much after nucleation. This super-slow transition predicts enhanced gravitational wave signals from bubble collisions and can be tested in future observations. Moreover, the remaining rare false vacuum patches give birth to baby BHs, which can account for the abundance of dark matter in our universe.
