报告人：马永革 教授

 

时间：2018年12月4日10:30-11:30

 

地点：理A110

 

 报告摘要: 

 

The statistical origin of black hole entropy is the great mystery which has to be explored by any quantum gravity theory. The quasi-local notion of isolated horizon was proposed in order to formulate the horizon of a black hole by phase space functions which can be quantized. We can consider the isolated horizon as an inner boundary of a four-dimensional asymptotically flat spacetime region. Because of the isolated horizon condition, it turns out that, with different gauge choices, the boundary degrees of freedom can be described either by a SU(2) Chern-Simons theory with punctures or by a SO(1,1) BF theory with sources. In both cases the entropy of the isolated horizon can be calculated in the framework of loop quantum gravity. The leading order contributions of the microscopical degrees of freedom are both proportional to the area of the horizon, while the sub-leading quantum corrections are different for different approaches. The BF theory description of the boundary degrees of freedom is applicable in arbitrary dimensions of spacetime.

报告人简历

 

马永革，1999年于北京师范大学物理系获博士学位；1999-2001年先后任阿根廷科尔多瓦大学和美国宾州州立大学博士后，2001年8月开始在北京师范大学物理系工作，现任教授，博士生导师；研究领域涉及：非微扰圈量子引力、广义相对论、规范引力理论、高维引力、宇宙学；曾主持完成国家自然科学基金重点项目等多个课题的研究，研究成果获得教育部2016年度高等学校科学研究优秀成果奖；曾任国际广义相对论和引力学会理事，现任中国物理学会引力与相对论天体物理分会副理事长，欧洲物理快报（EPL）编委。

欢迎各位老师和同学参加。