报告题目:Effects of quantum fluctuations of metric on the universe
报告人：杨荣佳教授
报告时间： 上午 10:00-11:00
报告地点：理学楼 A 110
报告题目： Effects of quantum fluctuations of metric on the universe
报告人： 河北大学 杨荣佳教授
报告摘要：
We consider a model of modified gravity from the nonperturbative quantization of a metric. We obtain the modified gravitational field equations and the modified conservational equations. We apply it to the FLRW spacetime and find that due to the quantum fluctuations a bounce universe can be obtained and a decelerated expansion can also possibly be obtained in a dark energy dominated epoch. We also discuss the effects of quantum fluctuations on inflation parameters (such as slow-roll parameters, spectral index, and the spectrum of the primordial curvature perturbation) and find values of parameters in the comparing the predictions of inflation can also work to drive the current epoch of acceleration. We obtain the constraints on the parameter of the theory from the observation of the big bang nucleosynthesis
时间： 2018年5月10日（周四） 上午 10:00-11:00
地点： 理学楼 A 110
报告人简介： 杨荣佳，清华大学博士，河北大学教授，主持国家基金2项和省杰青项目1项，发表论文30余篇，唯一作者论文10余篇，引用400余次，曾获省科学技术奖三等奖(排名第一)、河北省青少年科技创新奖、河北大学模范教师、河北大学三育人先进个人等奖励。
欢迎感兴趣的老师和同学参加。