物理学院“博约学术沙龙”系列报告
(总第 115期)

时  间：   2016年3月31日（星期4）下午3:10
地  点：   中心教学楼610

报告一：博士生报告    时间：15:10-15:40
题  目：A Monte Carlo Research for  Any Spin Resonating Valence Bond States
报告人：卢晨                    指导老师： 杨帆
摘要：The concept of resonant valence bond (RVB) state was first introdu-ced by Anderson to describe a possible quantum disordered ground state in the triangular lattice Spin= 1/2 Heisenberg antiferromagnet. We calcu-lated the spin-spin correlation and dimer-dimer correlation of the any spin resonating valence bond states in four different lattices, and study the respective topological entanglement entropy.

报告二：博士生报告    时间：15:40-16:10
题  目：Bound States in the Continuum in Three Dimensions
报告人：李金花                   指导老师： 张向东
摘要：Light confinement is conventionally achieved by suppressing radiation channels. In contrast, optical bound states have been recently shown to exist within the radiation continuum in large periodic arrays or three-dimensional nanostructures, in analogy with embedded eigenvalues in certain quantum systems. These bound states within the continuum are generally understood as the result of an interference mechanism that produces a resonance with infinite lifetime. We show that the transverse-magnetic (TM) modes and the transverse-electric (TE) modes are confined by properly tailoring the geometry of the object simultaneously. The state corresponds to a large amplification of the resonnance electric field and the resonance magnetic field at the structure.

报告三：博士生报告    时间：16:10-16:40
题  目：The Visual Investigation of Cis-nonproline Peptide Bonds for Protein Structure   
报告人：侯延珍                    指导老师：Antti Niemi ,何建锋
摘要：The cis conformation and cis/trans isomerization play an important role in the protein folding and biological function in the organics.We introduce the backbone Ca-based Frenet frames,the unit spherical surface and the stereographic projection to develop a novel and original technology for analyzing the characteristics of cis-nonP peptide bonds.The Ca-Ca distance,maps of the backbone Ca,C,N,O atoms and the sidechain CB atoms have been subtly presented for all the cis-nonP peptide bonds.