报告题目:Cosmological constant, matter, cosmic inflation and coincidence
报告人:薛社生教授
报告时间:上午11:00-12:00
报告地点:二楼教师活动中心
薛社生教授学术报告
报告题目 Title:Cosmological constant, matter, cosmic inflation and coincidence
报告时间 Time: 2019年10月15日上午11:00-12:00 (周二)
报告地点 (Room): 二楼教师活动中心
报告摘要 (Abstract):
We present a possible understanding to the issues of cosmological constant,
inflation, matter and coincidence problems based on the Einstein equation and
Hawking pair production of particles and antiparticles. In this scenario, the cosmological
constant is attributed to the spacetime horizon that generates matter via pair productions,
in turn the matter contributes to the RHS of the Einstein equation, conversely governing the
spacetime horizon. In such a way, the cosmological and matter terms are interacting via the
spacetime horizon in their evolution. As a result, the inflation naturally appears and results agree
to observations. The CMB large-scale anomaly can be explained and the dark-matter acoustic
wave is speculated. The cosmological term $Omega_{Lambda}$ tracks down the matter
term $Omega_{M}$ from the reheating to the radiation-matter equilibrium, then it varies very
slowly, $Omega_{Lambda}$ constant. Thus the cosmic coincidence problem can be possibly
avoided. The relation between $Omega_{Lambda}$ and $Omega_{M}$ is obtained and can
be examined at large redshifts.
报告人简介 (Bio):
Prof. Dr. Shesheng Xue, Professor of International Center of Relativistical Astrophysics.
ICRANet, Pescara, Italy Position: Professor in Physics
(2005-2012) Professor in Physics ICRANet, Pescara, Italy
(1998-2005) Researcher ICRA and University of Rome La Sapienza, Italy
(1990-1998) Post-doctor and Art 36 researcher, INFN, Milan, Rome and Frascati, Italy
(1987-1990) Post-doctor, Edinburgh University UK and Brookhaven National Lab. USA
(1986), Ph.D. Institutes of high energy physics and theoretical physics, Chinese Academy of Sciences,
Beijing, China

