Conveners
Cosmo
- Yingli Zhang (Tongji University)
- Luca Visinelli (Shanghai Jiao Tong University)
Cosmo
- Jason L Evans (SJTU/TDLI)
- Lei Zhang (Nanjing University (CN))
Inflation correlators encode ultra-high-energy physics at the inflation scale and are promising targets for future cosmological observations. Theory-wise, these objects are boundary correlators of bulk dS quantum fields, which play crucial roles in our understanding of QFT in dS. However, the analytical computation of dS correlators is notoriously difficult, and significant progress has been...
The cosmological observations of cosmic microwave background and large-scale structure indicate that our universe has a nearly scaling invariant power spectrum of the primordial perturbation. However, the exact origin for this primordial spectrum is still unclear. We present a theoretical framework and several viable models to explain cosmic inflation and dark matter simultaneously, both are...
I will briefly go over the three approaches of particle physics studies with gravitational waves: early universe phase transitions, topological and non-topological solitons and environmental effects, and highlight some recent developments on the theory side and on experimental detection that we have made in each of the fields.
强一阶电弱相变为解释正反物质不对称提供了必要条件，宇宙弦和畴壁是很多大统一等新物理模型的普遍预言。它们是太极和天琴计划、 脉冲星计时阵列等的重要科学目标之一。我将在此报告中跟大家交流一下粒子物理模型与早期宇宙对称性破缺，及相应的随机引力波产出与探测方面的研究进展。
We propose a novel scenario for dark matter (DM) in which weakly interacting massive particles (WIMPs) can freeze-in due to a first-order phase transition (FOPT) in the early Universe. The FOPT dilutes the preexisting DM density to zero, and leads to a sudden change in DM mass that prevents WIMPs from re-equilibrating due to their large mass-to-temperature ratio. Following the FOPT, WIMPs are...
Massive scalar field around a Kerr black hole can induce superradiant instabilities, resulting in the formation of a boson cloud around the black hole. Since rotating stellar-mass black holes are ubiquitous in every galaxy, the gravitational waves (GWs) emitted by their associated boson clouds together constitute a stochastic background on the sky, if cosmological dark matter consists of...
