1Optimization from Quantum Physics
报告人：文再文，北京大学北京国际数学研究中心
时间： 5月4日（周四）10:00
单位：中科院物理研究所
地点：M楼253议室
Optimization has been ubiquitous in describing various models in Quantum Physics, for example, electronic structure calculation,many-electron quantum mechanics, Bose-Einstein condensates and etc. It is interesting to see that linear and nonlinear eigenvalue optimization, semi-definite programming and optimization with orthogonality constraints as well many other important fields in optimization play more and more important roles in quantum physics. This talk will present a few recent advance on the interplay between these two fields.
2Holography for Boundary Conformal Field Theory
报告人：朱創新，National Tsing Hua University
时间：5月3日（周三）15:30
单位：中科院理论物理研究所
地点：Conference Hall 322
Conformal field theory (CFT) and boundary conformal field theory (BCFT) are crucial to the description of critical phenomena and quantum phase transition in many-body condensed matter system and quantum field theory. (B)CFT are also fundamental building blocks in string theory. In this talk, I will discuss an extension of the AdS/CFT correspondence to BCFT. Applications to Weyl anomaly, entanglement entropy of BCFT will be discussed. Comparsion with other concurrent proposal will be scrutinized.
3Liquid crystalline photonic crystals for femtoseconds laser pulse modulations
报告人：Iam Choon Khoo，Pennsylvania State University
时间：5月4日（周四）10:00
单位：北京大学现代光学研究所
地点：物理楼中楼215会议室
Liquid crystals possess extremely large optical nonlinearities that can be used in conjunction with various nano-structures and lasers ranging from the femtoseconds to CW operations, due to their extraordinarily large individual (organic) molecular nonlinearities that response in the sub-picoseconds time scale and collective crystalline optical nonlinearities that response in milliseconds –nanoseconds. This presentation is focused on recently obtained results of femto-seconds pulse compression/stretching/recompression, as well as slow light generation with cholesteric liquid crystals (CLC). We will discuss the underlying theory and recent corroborating experimental observations of these ultrafast phenomena. Since CLC can be fabricated to yield photonic bandgap and band-edge wavelength location throughout the visible to near IR regime, the aforementioned processes can be realized with any laser wavelength in this broad spectral range.
4从散射辐射传输成像到定量精细遥感的信息链——从数据到信息，从信息到知识
报告人：金亚秋，复旦大学
时间： 5月5日（周五）15:00
单位：北京大学大气与海洋科学系
地点：物理楼北547
5Black Holes and Gravitational Waves
报告人：Anthony Lasenby，Kavli Institute for Cosmology, Cambridge
时间： 5月5日（周五）16:00
单位：北京大学科维理天文与天体物理研究中心
地点：KIAA-PKU Auditorium
Black hole coalescences are a major source of gravitational waves in the universe. The current status of observations of these will be briefly reviewed, and we then turn to the gravitational waves themselves. The advantages of a particular gauge choice for representing the waves will be argued for, and used to demonstrate some astrophysical consequences relevant to the nearby environment of coalescing black holes, and other sources of gravitational radiation. A link will also be made to a form of gravitational wave 'memory'.
