報告人：韓秀峰，中科院物理研究所
時間：2月28日（周四）18:30
單位：中國科學院大學
地點：雁棲湖校區 教1-109
自旋電子學是基於電子的自旋、軌道和點和自由度，研究電子自旋相關輸運性質及自旋與磁、光、電、力 、熱、聲等物理場之間相互作用的新興學科。21世紀將是自旋電子學交叉學科蓬勃發展和自旋電子器件深入開發及廣泛應用的黃金時期。自旋電子器件將對計算機、物聯網、人工智慧、工業與民品、航空航天、深海探測、心磁腦磁成像與醫療檢測、信息科學和技術等眾多領域的發展起到巨大推動作用。該報告將簡述新型磁性隧道結材料製備以及隧穿磁電阻效應、基於量子阱態的自旋共振隧穿磁電阻效應和新型磁子閥效應等物理研究，並簡要介紹磁性隧道結及其隧穿磁電阻效應和新型磁子閥和磁子結效應等在自旋電子學核心器件方面的重要代表性應用與研究進展，例如磁隨機存儲器、自選邏輯/磁邏輯、TMR磁敏傳感器、自旋共振隧穿二極體以及一類新型磁子閥和磁子結等關鍵器件等。
報告人：Wanpeng Tan
時間：2月26日（周二）10:30
單位：中科院物理研究所
地點：M樓830
A mirror sector of our universe has been conjectured since Lee and Yang published their seminar work on parity violation. There are many desirable features from such mirror matter that has been predicted. However, no concrete model was successful or compatible with our known universe. A new mirror-matter model is proposed under a spontaneously broken mirror symmetry, which results in oscillations of neutral particles. As it turns out, neutron-mirror neutron (n-n') oscillations become the best messenger between the ordinary and the mirror worlds. The new n-n' model resolves the neutron lifetime discrepancy, i.e., the 1% difference between measurements from "Beam" and "Bottle" experiments. The picture of how the mirror-to-ordinary matter density ratio is evolved in the early universe into today's observed dark-to-baryon matter density ratio (~5.4) is gracefully demonstrated. A new theory of evolution and nucleosynthesis in stars based on the new model of n-n' oscillations presents remarkable agreement between the predictions and the observations. For example, progenitor mass limits and structures for white dwarfs and neutron stars, two different types of core collapse supernovae (Type II-P and Type II-L), pulsating phenomena in stars, etc, can all be easily and naturally explained under the new theory. Further tests and applications of the new theory will be discussed as well.
報告人：L.V.E. Koopmans，Kapteyn Astronomical Institute
時間：2月26日（周二）14:00
單位：清華大學
地點：蒙民偉科技南樓S727
報告人：Yaqian Wang，Boston University
時間：2月27日（周三）10:00
單位：中科院高能物理所
地點： B326, main building
The Mu2e experiment will measure the charged-lepton flavor violating conversion of a negative muon into an electron. Compared to previous measurement, Mu2e is expected to improve the precision by four orders of magnitude. The experiment is sensitive to a wide range of new physics, complementing and extending other CLFV searches. we expect to start taking physics data in 2022 with 3 years of running.
報告人：Robert de Mello Koch，South China Normal University & University of the Witwatersrand
時間：2月27日（周三）10:30
單位：中國科學院理論物理所
地點：Room 6420, ITP NEW BUILDING
We present the basic ingredients in bi-local holography, which is a constructive scheme for reconstructing AdS bulk theories in the vector model / AdS duality. The mapping from CFT primaries to bulk AdS and higher spin fields is described and an all order non-linear collective action is given. This generates bulk Feynman (Witten) diagrams (at tree and loop level).
報告人：梁豪兆，RIKEN / University of Tokyo, Japan
時間：2月27日（周三）15:00
單位：中科院理論物理所
地點：Room 6420, ITP NEW BUILDING
The tensor force is one of the most important components of the nucleon-nucleon interaction and plays a critical role in the shell evolution in exotic nuclei. In particular, during the past decade, the experimental data on the shell evolution of nuclei far from the stability line bloomed a series of works focused on the corresponding tensor effects in both the nonrelativistic and relativistic density functional theories (DFT).
In a series of recent works, we identified the tensor force up to the 1/M2order in each meson-nucleon coupling in the relativistic Hartree-Fock (RHF) theory, by the nonrelativistic reduction for the relativistic two-body interactions. The effects of tensor force on various nuclear properties can now be investigated quantitatively, which eventually allows fair and direct comparisons with the corresponding results in the nonrelativistic framework.報告人：舒菁，中科院理論物理所
時間：2月28日（周四）16:30
單位：清華大學
地點：理科樓鄭裕彤講堂
報告人：Donghui Quan，Eastern Kentucky Univ.
時間：3月1日（周五）14:00
單位：清華大學
地點：蒙民偉科技南樓S727
Despite the extremely low density and low temperature in the interstellar medium , the chemistry therein is surprisingly active. To date, more than 200 molecules, including many organic ones, have been detected in the interstellar medium. Some of these interstellar molecules are considered prebiotic molecules as they can serve as precursors of biological molecules such as amino acids . We have developed a series of models, including cold, warm-up and shock models, to study the chemical reactions of interstellar prebiotic molecules ethanimine and caynomethanimine isomers. By comparing the calculated abundances with the observed values, we studied in detail the formation and destruction mechanism, and pointed out the physical conditions of the corresponding regions. The study can enrich our understanding of astrochemistry, and may help to answer one of the human beings' ultimate question: the origin of life on the earth.
報告人：Bartek Czech，清華大學
時間：3月1日（周五）14:00
單位：中科院理論物理所
地點：Room 6420, ITP NEW BUILDING
If a holographic bulk spacetime is built out of quantum entanglement in the boundary theory, how do we understand the bulk connection? To inspect the entanglement structure of a boundary state, we dissect it into components and look at their quantum correlations. Each boundary component reconstructs a region of the bulk called entanglement wedge. The entanglement wedge (and its corresponding component subregion of the boundary) has an internal symmetry called modular flow, which has two properties that will be useful for our purposes. First, modular flow is a gauge symmetry because it relates to one another different ways of presenting the same physical system--the entanglement wedge. Second, modular flow is a generalization of choosing the phase of a pure quantum state in a Hilbert space. When we glue together two overlapping entanglement wedges to build a larger spacetime, we must specify how to map the observables in the first wedge (presented in some modular frame--in some gauge) to observables in the second wedge (also presented in some gauge). Thus, gluing together two component subregions of the boundary--as well as two entanglement wedges--requires a connection that relates their respective modular frames. This connection is analogous to specifying the phase of a quantum state that evolves under a time-dependent Hamiltonian, that is the Berry phase. I argue that the modular Berry connection is the boundary origin of the usual, geometric connection in the bulk. I will sketch some subtleties in the formal construction of the modular Berry connection, give examples and list key questions for the future.
更多報告信息：中國物理學會期刊網學術講座列表
楊-米爾斯理論說了啥？為什麼說這是楊振寧超越他諾獎的貢獻？
利用膠體系統研究玻璃態（一）
天行見物理之二：其命維新
再見了，駐留在火星的偉大哨兵——機遇號！
宇宙膨脹背後的故事（之四）：察顏觀色識星移
輕巧靈動的未來
12個革命性的公式量子十問之四：「薛丁格貓」為什麼會自然死亡？| 郭光燦
先生之風，山高水長 | 送別梁敬魁先生
雷達啟發的強雷射啁啾脈衝技術——軍事需求催生基礎研究的一個典型案例
那棵消失的樹—回憶導師張首晟