关于举行徐翔博士学术报告的通知

报告题目：CubicInstability in the Q-tensor Theory of Liquid Crystals

报告人：徐翔博士(美国普渡大学)

报告时间：2015年5月8日下午4:15-5:15

报告地点：4号楼4131室

欢迎广大师生参加。              

                                         数学学院

                                   2015年3月17日

报告摘要：TheLandau-de Gennes theory on the study of nematic liquid crystals wasinitiated by the Physics Nobel Prize winner P.-G. de Gennes in the1970's, and it began to attract the extensive attention ofmathematicians in recent years. This theory is a phenomenologicaltheory in which stable states of the liquid crystal materialcorrespond to minimizers of a free energy. In its free energy form,there is however an unusual cubic term. In this talk we will discussthe dynamic effects induced by this cubic term by considering the$L^2$ gradient flow dynamics generated by the free energy. We work inboth two and three dimensions and focus on understanding therelations between the physicality of the initial data and globalwell-posedness of the system.