1
报告人：张鑫，西湖大学
时间：4月16日（周二）10:00
单位：中国科学院物理研究所
地点：M249会议室
摘要：
蛋白质的凝聚和聚集是一个多步骤的复杂物理化学变化过程。通过相分离形成的凝聚体是无膜细胞器的重要组成单元；而错误折叠的变性蛋白会首先形成液态多聚体，随后进一步发展成为固态聚集体。临床上，阿尔兹海默症、帕金森症、渐冻人症等多种神经退行性疾病的产生与蛋白质聚集密切相关。不同蛋白质聚集状态的致病机理以及代谢途径不尽相同，而如何区分蛋白凝聚和聚集的不同状态，一直是该研究领域的一个技术难题。针对这一问题，我们通过解析蛋白质的物理微环境，发展了一系列面向活细胞内蛋白质凝聚和聚集的定量成像新技术，以这些化学工具的特有优势为切入点，研究和解决了相关的重要问题，为疾病的诊断和治疗提供了新思路。
报告人简介：
张鑫现任西湖大学化学教授。张鑫于2010年获得美国加州理工学院博士学位，随后进入美国Scripps研究所做博士后研究，曾任美国宾州州立大学化学系和生物化学与分子生物学系助理教授、长聘副教授、Paul Berg Early Career讲席教授。张鑫课题组以“生物聚集体化学”为研究中心，解决此领域亟需解决的重要科学和技术问题。张鑫担任多个国际期刊编辑和编委，获得多个奖项，包括斯隆研究奖、皮尤生物医学奖、美国自然科学基金会早期职业奖、美国国家科学院Kavli Fellow等。
2
报告人：Jinwu Ye，Great Bay University
时间：4月16日（周二）14:00
单位：中国科学院物理研究所
地点：M830
摘要：
What is nature of time remains the most important problem in Nature. Here we address a closely related but much simpler problem: what is the nature of temperature. Temperature is the concept unifying different branches of physics such as condensed matter physics, particle physics, quantum black holes and quantum information science. There are two kinds of temperature. One is the classical temperature which describes the thermal motion of the quantum material or particle physics experiments. It is determined by an external reservoir or self-determined in a canonical or micro-canonical ensemble respectively, does not contain $ \hbar $ explicitly and remains finite in the $ \hbar \to 0 $ limit. Another one is the quantum temperature which describes the quantum entanglement between the black hole interior and exterior. It is determined by the geometry of a black hole near its horizon ( so also called Hawking temperature ),contains $ \hbar $ explicitly and vanishes in the $ \hbar \to 0 $ limit. In the former case, when the sample is moving, its temperature stays the same in a micro-canonical ensemble, but increases in a canonical ensemble,independent of any observer. In the latter case, when the black hole is moving, its temperature stays the same to a distant observer, but increases when it moves closer to the observer. The Tolman effect is also reformulated as the quantum entanglement temperature. It is AdS/CFT which establishes the connections between the two temperatures. A full quantum theory of gravity is needed to unify the two temperatures into a unique one. The implications on the Eigenstate Thermalization Hypothesis (ETH), astronomical black holes in an expanding universe and two coupled Sachdev-Ye-Kitaev models to simulate a transversal wormhole are given. The experimental detections of these novel effects are discussed.
报告人简介：
Prof. Ye received Ph.D from Yale University. Currently, he is a chair professor at the newly found Great Bay university in Dongguan, Guangdong, China. He is a condensed matter theorist working on the interdisciplinary field of condensed matter, quantum optics, cold atoms, non-relativistic quantum field theory. Recently, he has been particularly interested to explore possible deep connections among quantum/topological phases, Sachdev-Ye-Kitaev models and quantum black holes from material's point of views.
3量子Rabi模型的基态演化和临界现象
报告人：陈叶鸿，福州大学物信学院
时间：4月16日（周二）14:30
单位：中国科学院物理研究所
地点：M253会议室
摘要：
量子Rabi模型是研究光-物质相互作用的基本模型，其基态在不同参数条件下会展现出不同的物理特性。其中，随着耦合的增强，系统的基态会逐渐变成比特与光子之间的纠缠。这个过程当中，有意思的是在合适的条件下，耦合系数超过临界点时系统会出现光子数激增的现象——即超辐射量子相变（Superradiant phase transition）。近期研究进一步表明超辐射量子相变在量子传感和量子精密测量领域具有显著的增强效果。进行这些研究需要保证系统能够沿着基态进行演化。报告人将介绍如何利用绝热、绝热捷径等技术实现这种基态演化，从理论和实验上去研究和观测相应的物理现象。
报告人简介：
陈叶鸿，福州大学物理与信息工程学院教授，福建省“闽江学者”特聘教授。2018年6月博士毕业于福州大学，导师为郑仕标教授，其后在日本理化学研究所Franco Nori组从事博士后研究。曾获日本学术振兴会外国人特别研究员奖学金(JSPS Fellowship)，日本理化所“樱舞”学术创新奖等荣誉。主要研究领域为量子光学、量子计算和量子模拟，方向包括基于光场压缩的量子增强效应、基于玻色纠错码的容错量子计算、优化量子绝热控制、平衡态量子相变等。以第一作者（含共一）在Physical Review Letters（2篇）等刊物上发表文章20余篇（包括4篇ESI高被引论文），合作发表文章40余篇，文章被引用1600余次，4篇论文被引用超100次，h-index：26。
4
报告人：Prof. Luca Delacretaz, University of Chicago
时间：4月17日（周三）10:00
单位：中国科学院物理研究所
地点：M830
摘要：
I will show how to formulate Fermi liquid theory as an effective field theory of bosonic degrees of freedom, using the formalism of coadjoint orbits. While at the linear level, this theory reduces to multidimensional bosonization, it necessarily features nonlinear corrections that are fixed by the geometry of the Fermi surface. These are crucial to reproduce nonlinear response, which is not captured by previous bosonization approaches. The effective field theory framework furthermore systematically parametrizes power law corrections to Fermi liquid behavior, and provides a computationally advantageous approach for non-Fermi liquids -- strongly interacting fixed points obtained by deforming Fermi liquids with relevant interactions.
5
报告人：Prof. Ian McCulloch, Tsing Hua University（Taiwan）
时间：4月17日（周三）10:00
单位：清华大学物理系
地点：理科楼C302
摘要：
Ferromagnetic ground states have often been overlooked in comparison to seemingly more interesting antiferromagnetic ground states. However, both the physical and mathematical structure of ferromagnetic ground states are particularly rich. The highly degenerate and highly entangled ground states of the ferromagnetic spin-1 biquadratic model are scale invariant, originating from spontaneous symmetry breaking from SU(3) to U(1)×U(1) with two type-B Goldstone modes. The ground state degeneracies are characterized as the Fibonacci-Lucas sequences. Similarly rich physics occurs in other models, such as SO(4) spin-orbit model.
报告人简介：
Professor Ian McCulloch received his PhD from the Australian National University, before moving to Europe for postdoctoral positions at the Instituut-Lorentz in The Netherlands, and RWTH-Aachen University in Germany. In 2007, he returned to Australia, to the University of Queensland, in Brisbane. Since August 2023, he is a Visiting Professor at National Tsing Hua University, Taiwan. His research interests are computational methods for quantum many-body systems using tensor network methods and DMRG. He was a pioneer of several key technical developments including non-Abelian symmetries, and the iDMRG method for translational invariant infinite systems. He has worked on applications in a variety of areas of condensed matter physics including atomic gases and topologically ordered states.
6
报告人：颜波，浙江大学
时间：4月17日（周三）10:30
单位：北京大学物理学院
地点：物理楼 西213
摘要：
动量晶格使用原子外态作为等效维度，实现了晶格体系的单格点独立调控，非常适合开展拓扑，无序等实验研究工作。近来，我们发展了拉曼动量晶格新技术，实现原子内外态结合的晶格构型，极大地拓展了系统的模拟能力。利用此技术，我们开展了一系列拓扑量子模拟的研究工作，包括实现非厄米SSH模型，AB cage模型，SU(2)等效规范场等。相信此技术将为冷原子研究注入新的活力。此外，报告也将简要介绍我们在激光冷却极性分子研究的进展，包括BaF分子精密光谱测量，BaF分子的激光偏转，BaF分子的多普勒冷却，以及它在精密测量领域的展望。
报告人简介：
颜波，浙江大学研究员，博士生导师。2004年浙江大学本科毕业，2009年上海光机所获得博士学位。2009-2011年及2011-2015年，先后在中科大微尺度国家实验室和美国科罗拉多大学JILA开展博士后研究。2015年入选国家“青年千人”计划，任职于浙江大学物理学院。长期从事冷原子与冷分子实验研究，在量子光学、冷原子物理、量子精密测量方面有丰富研究经验。近年来，工作聚焦在超冷原子动量晶格和激光冷却分子研究，开展相关量子模拟和精密测量研究工作。迄今，共发表学术论文40多篇，包括1篇Nature，1篇Science，1篇Nature Photonics，10篇Phys. Rev. Lett.，谷歌学术引用次数超过3800次。
7
报告人：胡颖，山西大学
时间：4月17日（周三）15:00
单位：北京大学物理学院
地点：西563会议室
摘要：
While enchanting non-flermitian properties umattainable in Hermitian systems are widely revealed, genuine quantum non-Hermitian phenomenology remains largely uncharted teritory, Here, we show how engineered non-Hermiticitb gives rise to novel phenomena with a genuine quantum nature. We investigate a system of atoms (or artificial atoms)embedded in a particular type of bath, which in turn interacts with an outer bath and dissipates. By engineering the interaction with the bath and the bath itself, the atomic properties can be influenced in an unprecedented manner. ln particular, we find the atomic emission can be suppressed by dissipation in an unusual way; the algebraic scaling with the relevant parameters acquires firactional power - the fractional Quantum Zeno effect, Ths interestig behavior cannot occur if the results in exotic long-range interactions of atoms. We futher find FOZ-induced strong single-photon nonlinearity. Remarkably, we identify that the sub-Poissonian quantum statistics of photons，which has no classical analogues，stems here from the key role of non-Hemmiticity. Our setup is experimentally feasible with the techiquesused to design lattice models with dissipative couplings. This work opens a path to exploring non-Hermitian guantum optics as wel as quantum many-body non-Hemmitian physics.
报告人简介：
胡颖，山西大学激光光谱研究所教授，2018年入选国家中组部高层次人才计划。从事基于光与原子的新奇物态与量子调控等交叉前沿领域的理论研究。博士毕业于美国范德堡大学,先后在香港浸会大学非线性中心、北京大学量子材料科学中心、奥地利因斯布鲁克大学Peter Zoller教授团队从事博士后研究,2017年加入山西大学。近年成果发表在Nat. Phys.、Phys. Rev. X 和 Phys. Rev. Lett.等顶级期刊。
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报告人：史志文，上海交通大学
时间：4月18日（周四）10:00
单位：中国科学院物理研究所
地点：M楼253会议室
摘要：
石墨烯虽具有优异电输运性质，但由于没有能隙而无法用于构建晶体管器件。理论上，准一维的石墨烯纳米带因量子限域效应而打开能隙，且能隙大小可通过纳米带宽度和边缘结构来调控，是构建高性能电子器件与芯片的理想材料。尽管目前已经发展了多种制备石墨烯纳米带的方法，但是可用于半导体器件的高质量石墨烯纳米带的制备问题一直没有解决。在本报告中，我将介绍一种在绝缘基底上直接生长高质量石墨烯纳米带的全新技术方法。基于该方法，我们实现了石墨烯纳米带在氮化硼层间的嵌入式生长，形成“原位封装”的石墨烯纳米带结构。所制备的石墨烯纳米带宽度小于5nm，长度可达250μm，边缘结构整齐，手性一致。基于该“原位封装”纳米带的场效应晶体管具有优异的性能：载流子迁移率达4,600cm2V–1s–1，开关比可达106。这些出色的性能表明六方氮化硼“原位封装”的石墨烯纳米带有望应用于未来高性能碳基纳米电子器件与芯片。
报告人简介：
史志文，上海交通大学物理与天文学院教授。2012年于中科院物理研究所获物理学博士学位；随后在美国加州大学伯克利分校从事博士后研究；2016年加入上海交通大学物理与天文学院。主要从事实验凝聚态物理研究，研究领域涉及低维材料与器件、近场光学、激光光谱学、电输运等方面。已在石墨烯、碳纳米管和六方氮化硼等低维材料的研究中取得了多项原创性成果，在Nature、Nature Physics、Nature Photonics、Nature Materials、Nano Letters、Advanced Materials等学术期刊上发表论文80余篇，总引用9000余次。
9
报告人：沈志强，中国科学院上海天文台研究员
时间：4月18日（周四）16:00
单位：清华大学物理系
地点：理学院郑裕彤大讲堂
摘要：
自从银河系中心致密射电源人马座A*于1974年被首次探测到，在过去的近半个世纪里，揭开这一距离我们最近的超大质量黑洞候选者的真面目便成为全球天文学家的共同追求。2020年5月12日晚上9点，上海天文台与全球多地同时召开新闻发布会，展示了位于银河系中心的超大质量黑洞人马座A*的首张照片，这一期待太久的肖像提供了银河系中心真实存在超大质量黑洞的最为直接的视觉证据。这是继2019年4月10日发布的位于更遥远星系M87中央黑洞照片之后的又一重大突破。来自我们银河系中心和来自M87的两个超大质量黑洞质量相差了3个数量级，但它们环状阴影的图像是惊人的相似。本报告将从一个观测者的视角给大家介绍我们是如何一步步靠近黑洞并最终揭开银河系中心黑洞的神秘面纱，以及未来的拍摄黑洞“电影”计划。
报告人简介：
沈志强，中国科学院上海天文台研究员、台长。主要从事射电天文学中的甚长基线干涉测量技术及其在天体物理中的应用研究，领导的一个国际合作小组“发现了银河系中心人马座A*是超大质量黑洞的最新证据”入选“2005年度中国基础研究十大新闻”。牵头组织协调国内学者参加人类首张黑洞照片拍摄的事件视界望远镜国际合作，作为合作成员获2020年度基础物理学突破奖等。中国科学院和上海市重大合作项目“上海65米射电望远镜”首席科学家，该项目以“亚洲第一射电望远镜建成”入选2012年中国十大科技进展新闻，获2018年度上海市科技进步奖特等奖。
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报告人：Kazu Omukai，日本东北大学
时间：4月18日（周四）15:30
单位：北京大学物理学院
地点：KIAA-Auditorium
摘要：
Stars in the early universe were likely massive. This talk provides an overview of their formation processes and characteristics, then examine the potential for supermassive star formation and the subsequent emergence of direct collapse black holes (DCBHs) in some environments, e.g., characterized by strong far-ultraviolet (FUV) radiation, dense shocks, or dynamic heating from mergers. Challenging the traditional viewpoint, our numerical studies demonstrate that, even in environments with some metallicity (less than approximately 0.1% of solar values)—where dust cooling leads to cloud core fragmentation and the emergence of numerous low-mass stars—accretion flows can still preferentially channel gas to central massive stars, enabling their growth to supermassive objects, similar to the primordial case. This super-competitive accretion process allows only a few stars to become supermassive, along with a large number of low-mass stars. Beyond the 0.1% solar metallicity threshold, metal-line cooling prevents such growth due to smaller accretion rates. Previous analyses have overlooked stellar radiative feedback; however, our recent radiation hydrodynamics simulations have confirmed these findings: the mass spectrum's upper limit remains largely unaffected, while stellar feedback significantly reduces the number of low-mass objects.
This new channel of DCBH formation through super-competitive accretion introduces a novel paradigm for the formation of seed black holes, relaxing the constraints imposed by metallicity and increasing the abundance of seed black holes. The talk concludes by assessing whether seed black holes formed in this manner could explain the population of current supermassive black holes.
报告人简介：
Education:
03/2000 Graduate School of Science, Kyoto University, PhD in Physics
Professional Carrier:
04/2000 Japan Society for Promotion of Science postdoctoral fellow
Staying at National Astronomical Observatory of Japan, Arcetri Observatory, Florence, Italy, Oxford University, UK
12/2003 Assistant Professor, Division of Theoretical Astronomy, National Astronomical Observatory of Japan
01/2010 Associate Professor, Department of Physics, Graduate School of Science, Kyoto University
04/2013 Professor, Astronomical Institute, Graduate School of Science, Tohoku University.
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