Topic: Probing Early Universe with PBHs and SIGWs
Speaker: Prof. Yungui Gong
Coordinates: PCFT C1124, 4pm, Thursday, June 10
Abstract: Gravitational waves opened a new window to uncover some of the universe’s biggest mysteries and became a game-changer for astronomy. The primordial quantum fluctuations are the seeds of primordial black holes (PBHs) which may explain all dark matter with the mass around 1021 g. Accompanied with the production of PBHs, scalar induced secondary gravitational waves (SIGWs) are also generated. SIGWs can be detected by future space based gravitational wave observatory like LISA, Taiji and TianQin. Therefore, the observations of PBHs and SIGWs provide us a new tool to probe inflationary physics. In this talk, I will discuss a new mechanism to produce PBHs and SIGWs. In particular, in this mechanism, Higgs field is responsible for the mass of matter, inflation, the productions of PBH dark matter and SIGWs.