3+1維拓樸量子場論與量子重力浮現


COLLOQUIUM:- Topological Quantum Field Theory in 3+1D and the Emergence of Quantum Gravity

Topological quantum field theory(TQFT) is a very powerful theoretical tool to study topological phases and phase transitions. In 2+1D, it is well known that the Chern-Simons theory captures all the universal topological data of topological phases, e.g., quasi-particle braiding statistics, chiral central charge and even provides us a deep insight for the nature of topological phase transitions. Recently, topological phases of quantum matter are also intensively studied in 3+1D and it has been shown that loop like excitation obeys the so-called three-loop-braiding statistics. In this talk, the speaker will discuss a TQFT framework to understand the quantum statistics of loop like excitation in 3+1D. Most surprisingly, this new class of 3+1D TQFT even provides us a new route towards a quantum theory of gravity.  
 
時間:2018.09.21(五) 16:00~17:00
地點:香港中文大學 科學館L2講堂
講者:顧正澄 教授 Prof. Zhengcheng GU(香港中文大學物理系)
語言:英語

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此活動由香港中文大學物理系主辦。

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