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A Monte Carlo Research for Any Spin Resonating Valence Bond States

发布日期:2016年03月31日

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.
 

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