1
报告人：Professor Aviad Frydman，Department of Physics, Bar Ilan University, Israel
时间：3月26日（周二）10:00
单位：中国科学院物理研究所
地点：M253 会议室
摘要：
The Superconductor Insulator Transition (SIT) in 2D layers and thin films has been a topic of great interest for the past few decades. While much progress has been made in the field, both theoretically and experimentally, there are still important open questions, such as the possible existence of an intermediate anomalous metal phase and the nature of the insulating phase.
Several tuning parameters have been used in the past to drive the transition, including thickness, disorder, magnetic field, chemical composition etc. I will present a new tuning parameter, i.e., hydrostatic pressure, to gain further information on the electric properties close to the transition, and especially on the insulating and metallic phases. For this purpose, we grow thin films of amorphous Indium Oxide directly on a diamond which is part of a high pressure Diamond Anvil Cell, thus enabling us to apply pressure of up to ~20 GPa on a thin disordered film. Starting with an insulating film we find that initially, up to ~1.5GPa, pressure induces a transition to a superconducting state with growing critical temperature. However, applying higher pressure causes a suppression of superconductivity and drives the film back to an insulating state through an apparent metallic phase. Interestingly, the electronic properties of the pressure-induced insulator are different than those of the insulator in ambient conditions. I will discuss the implications of these results on the nature of superconductivity in highly disordered 2D superconductors and on the presence of an anomalous metal state.
报告人简介：
Aviad Frydman is a Physics professor in Bar Ilan University in Israel. He graduated from the Hebrew University of Jerusalem with Highest Distinction. He performed his post-doctoral research at the University of California, San Diego, working with Robert C. Dynes. In 1999 he obtained an academic position at Bar-Ilan University where he became a full Professor in 2013. During 2006 and 2007 he was a visiting professor in Yale University. From 2012 to 2013 he served as a visiting professor in the Institut Néel, France, and in 2021 to 2022 he was a visiting professor at Cambridge University in the UK. During 2015 to 2017 he served as a Chair of excellence, LANEF, Grenoble. Since 2022 he is serving as the Chair of the Physics Department at Bar-Ilan University.
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报告人：潘建松, 四川大学物理学院
时间：3月26日（周二）14:00
单位：清华大学物理系
地点：理科楼C109
摘要：
The manipulation of particle transport in synthetic quantum matter is an active research frontier. In this presentation, I will introduce our recent efforts in harnessing chiral currents in ultracold atoms with synthetic gauge field, by employing the interplay with Floquet engineering and contact interaction. I will mainly focus on our experimental demonstration of engineered topological transport in a synthetic flat-band lattice of ultracold atoms. Besides, I will briefly introduce a theoretical viewpoint toward the switch of chiral currents with contact interaction if time permits.
报告人简介：
潘建松，博士，四川大学特聘研究员。分别于2012年和2017年在中国科学技术大学取得学士和博士学位，随后加入上海交通大学维尔切克量子中心开展博士后研究。2019年加入新加坡国立大学物理系，担任 Research Fellow。2021年加入四川大学物理学院，担任特聘研究员。主要研究领域是冷原子物理和量子模拟理论，重点关注超冷原子气体系统中的新奇量子相和多体动力学。
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报告人：Prof. Stefan Willitsch，Department of Chemistry, University of Basel, Switzerland
时间：3月27日（周三）10:00
单位：清华大学物理系
地点：理科楼C302
摘要：
Molecules are quantum systems of prime significance in a variety of contexts ranging from physics over chemistry to biology. In spite of their importance, the development of quantum technologies for molecules has remained a long-standing challenge due to their complex energy-level structures. Trapped molecular ions are particular attractive in this context as it is possible to observe, manipulate and control single isolated molecules under precisely controlled conditions. We will give an overview of the current state-of-the-art in the field of molecular-ion quantum technologies and highlight some salient applications. We will focus on recently developed quantum-non-demolition techniques for the non-destructive detection of the internal quantum states of single trapped molecular ions. These approaches offer new perspectives not only for the detection, but also for the preparation and the manipulation of molecular quantum states on the single-particle level with a sensitivity several orders of magnitude higher compared to previous schemes. We will discuss applications of these techniques in the realms of precision molecular spectroscopy and chemistry.
报告人简介：
Stefan Willitsch graduated in natural sciences from ETH Zurich (Switzerland) in 2000 and received his PhD from ETH in 2004 with a dissertation on high-resolution molecular spectroscopy. From 2004–07, he was a Junior Research Fellow at the University of Oxford (UK). He was appointed lecturer in physical chemistry at University College London (UK) in 2007 and joined the the University of Basel (Switzerland) in 2008 as professor of chemical and molecular Physics. His research focuses on the development of quantum technologies for molecular systems with applications in precision measurements, sensing and chemical-reaction studies.
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报告人：杨哲森，厦门大学
时间：3月27日（周三）10:30
单位：中国科学院理论物理所
地点：南楼6620
摘要：
非厄米趋肤效应是近两年来理论和实验的研究热点之一，它是指在一个无杂质、无相互作用的开边界系统中，本征波函数可以都局域在边界的一类新奇现象。非厄米趋肤效应的出现意味着传统布洛赫定理及能带理论的失效。为了定量的刻画非厄米趋肤效应，人们发展了广义布里渊区理论。在本次报告中，我将会介绍：
(1) 什么是非厄米趋肤效应；
(2) 什么是广义布理渊区理论；
(3) 如何在凝聚态系统中实现以及探测非厄米趋肤效应；
(4) 二维广义布里渊区理论及其挑战。
报告人简介：
杨哲森，厦门大学物理科学与技术学院教授。2020年毕业于中国科学院物理研究所，随后在中国科学院卡弗里理论科学研究所从事博士后研究工作。曾获2021年博士后创新人才计划和基金委优秀青年基金的支持，入选2024年度彭桓武青年科学家访问计划。主要研究兴趣集中在非厄米系统的新奇物理现象，特别是非厄米趋肤效应。
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报告人：季子铭，意大利国际高等研究院
时间：3月27日（周三）15:30
单位：中国科学院理论物理所
腾讯会议：236-199-505
会议密码：202427
摘要：
Anti-de-Sitter space as a rigid spacetime could be used as an infra-red cutoff for quantum field theories. It also allows interpolation between weak coupling and strong coupling, and phase transitions in the bulk manifest themselves as transitions between boundary conditions. I will discuss phase transitions in two dimensional solvable models and explain them using the boundary conformal theories. In doing this, a mechanism relevant for the quantum phase transition of the Yang-Mills theory in higher dimensions is conjectured.
报告人简介：
季子铭博士于2021年在普林斯顿大学获得物理学博士学位，师从Steve Gubser教授和Simone Giombi教授。自毕业以来，他一直在意大利的国际高等研究学院（SISSA）从事博士后研究。
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报告人：Yujin Tong，University of Duisburg-Essen, Germany
时间：3月27日（周三）14:30
单位：中国科学院物理所
地点：M楼 253会议室
摘要：
Condensed matter interfaces, found both in nature and human-made devices (like the seabed, cell membranes, and electrodes), are critical for understanding energy and mass flow. However, investigating their molecular structures and dynamics is challenging. Techniques involving photons are preferred over those using electrons or ions due to the latter's limitations in condensed matter. Traditional optical spectroscopies (e.g., infrared, UV-vis absorption, Raman scattering) offer valuable insights into condensed matter's speciation and structure but fall short in interface sensitivity and selectivity. Sum Frequency Generation (SFG), a second-order nonlinear optical process, stands out for its interface sensitivity and ability to provide unique information about interfacial species' order, symmetry, and orientation. Utilizing femtosecond lasers with SFG can also reveal ultrafast dynamics, offering a deeper understanding of these interfaces.
In my presentation, I will discuss how SFG is crucial for investigating the symmetry, order and orientation of species at interfaces, drawing on my latest research. I'll cover the mathematical principles of SFG's selection rule, interactions between light and materials, and energy relaxation dynamics. Finally, I will address SFG's limitations and its future potential in studying electrified interfaces.
报告人简介：
Dr. Yujin Tong graduated with a bachelor's (2003) and master's (2005) degree from Harbin Institute of Technology and completed his Ph.D. at Hokkaido University's Catalysis Research Center in Japan in 2010. He currently serves as a Senior Lecturer in the Physics Department at the University of Duisburg-Essen, Germany, and was the former groupleader of the " Nonlinear SpectroElectrochemistry Group " at the Fritz Haber Institute of the Max Planck Society. He has been the former president of the Chinese German Chemical Association (CGCA) from 2016 to 2018, a member of the International Society of Electrochemistry, the German Physical Society, and a member of the Ertl Center for Electrochemistry and Catalysis (named after the 2017 Nobel Laureate in Chemistry). Tong has dedicated years to the development and application of advanced surface science characterization methods, notably applying nonlinear laser spectroscopy techniques to the investigation of electrified solid/liquid interfaces, earning wide international recognition. As the first author or corresponding author, he has published over 60 research papers in leading international journals such as Nature Communications, Angewandte Chemie International Edition, and the Journal of the American Chemical Society. He has been invited to review grant proposals for the French National Research Agency (ANR) and to peer-review for prestigious journals including Nature series and journals of the American and German Chemical Societies. He frequently delivers keynotes at international conferences and actively organizes academic and technical exchanges between China and Germany.
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报告人：陈朝宇，南方科技大学
时间：3月28日（周四）10:00
单位：中国科学院物理所
地点：M楼 253会议室
腾讯会议号：628 752 726
密码：240328
摘要：
报告人将重点介绍其基于先进光源开发新型角分辨光电子能谱（ARPES）测量技术，并利用不同ARPES系统的优势在磁性拓扑物态调控方面的一系列工作。在角分辨光电子能谱技术的开发方面，参与完成了国际首台激光光源自旋分辨角分辨光电子能谱的研制工作，其自旋分辨能量分辨率达到2.5毫电子伏（2013年）；发展了基于同步辐射光源的空间分辨角分辨光电子能谱技术，将光电子能谱的空间分辨率推进到100-200纳米量级（2017）。在拓扑物态的电子结构研究方面，发现了对称性和能带拓扑协同作用下的表面态拓扑保护机制和表面自旋-动量锁定机制，解释了磁性拓扑绝缘体表面态的复杂行为，实现了拓扑表面态磁性能隙的打开和“半磁性拓扑绝缘体”这一新型拓扑物态，为量子反常霍尔效应等拓扑输运在更高温度下的观测奠定基础。
报告人简介：
陈朝宇，南方科技大学量子科学与工程研究院研究员，博导。2013年毕业于中国科学院物理研究所，凝聚态物理博士。2013年9月至2015年2月在法国国家同步辐射中心担任博士后。2015年3月至2018年10月在同单位担任永久职位束线科学家，2018年10月回国加入南方科技大学，任副研究员。2022年2月起任研究员。长期从事量子材料的能带调控研究和先进角分辨光电子能谱技术的开发。已发表SCI 论文近100 篇，被引5700 多次，h-index 39 (谷歌学术)；(共同)一作或通讯文章27 篇，包含PRX/PRL 3篇，Natl. Sci. Rev. 1 篇，Nat. Commun. 1 篇，PNAS 1篇，Adv. Mater. 2 篇，Nano Lett. 2 篇等；其中有5 篇被引超过100 次。目前主持和承担国家自然科学基金面上项目，广东省自然科学基金杰出青年项目，国家重点研究计划，“广创团队”，“孔雀团队”，“粤港澳联合团队”等课题。
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报告人：吕定顺，ByteResearch
时间：3月28日（周四）14:30
单位：中国科学院物理所
地点：M830
摘要：
At present, Moore's Law is gradually failing, and various new computing architectures are emerging one after another. Quantum computing is likely to be a revolutionary technology in the future and has recently exhibited great potentials in predicting chemical properties for various applications in drug discovery, material design, and catalyst optimizationtransition oxygen system such as NiO which only requires 20 qubits which may require almost 10k qubits vice versa. Besides, I will also briefly discuss other theoretical research in quantum chemistry simulation, the experimental realization of mainstream quantum systems, and future research trends and difficulties.
However, quantum computing is in the era of noise intermediate-scale (NISQ), with the number of qubits up to (50-1000), limited coherence time, and gate fidelity. Progress has been made in simulating small molecules with no more than 20 qubits, by using quantum algorithms such as variational quantum eigensolver (VQE). Yet, originating from limitations of the size and the fidelity of near-term quantum hardware, how to accurately simulate large scale molecules and materials remains a challenge.
In this talk, we shall present our work towards the larger scale and realistic chemistry simulation. Particularly, combine with quantum embedding theory, density matrix embedding theory as an example, we have greatly enhanced the ability of the current quantum device to simulate complex transition oxygen system such as NiO which only requires 20 qubits which may require almost 10k qubits vice versa. Besides, I will also briefly discuss other theoretical research in quantum chemistry simulation, the experimental realization of mainstream quantum systems, and future research trends and difficulties.
报告人简介：
吕定顺，博士，字节跳动ByteDance Research，量子计算和量子化学方向研究员, 技术负责人。本科就读于哈尔滨工业大学应用物理学专业，2012年本科毕业后，保送至清华大学交叉信息研究院，师从国际知名离子阱实验专家Kihwan Kim，从事量子计算和量子模拟方面的研究，至今在量子计算、量子模拟领域等已经有10+年研究经验。2018年博士毕业后，加入华为2012实验室，担任量子计算和量子算法研究员，专精并聚焦在量子软件和算法研究领域。在华为工作期间主要聚焦基于变分本征求解（VQE）的量子多体模拟（量子化学模拟，Hubbard model，Schwinger model，Heisenberg model模拟）以及量子近似算法研究（QAOA）。2021年4月，入职字节跳动，继续聚焦量子计算和量子化学方向的研究。2021年8月，加入CCF量子计算专业组，成为首批执行委员。
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报告人：Congjun Wu, Department of Physics, School of Science, Westlake University
时间：3月28日（周四）16:00
单位：清华大学物理系
地点：理科楼郑裕彤讲堂
摘要：
Typical mean-field theories for many-body states rely on two-fermion orderings. Order parameters lie in either the particle-particle channel such as pairing orders for superconductivity, or, in the particle-hole channel such as spin-density-wave orders for antiferromagnetism. Nevertheless, in high energy quantum chromodynamics, three quarks form a colorless baryon, and in nuclear physics, two protons and two neutrons form a spin and isospin singlet α-particle. We examine this class of multi-particle fermion multi-particle clustering instabilities in one-dimensional spin-3/2 fermion systems via the renormalization group and bosonization method, which exhibit the quartetting superfluidity (charge 4e) and quartet density wave orderings. For a two-band superconductivity, we identify a normal state with a two-particle-two-hole type ordering exhibiting time-reversal symmetry breaking because of strong phase fluctuations. We also introduce a mechanism of the charge-6e state via frustration of pair-density-wave state, which may be relevant to the recent hc/6e oscillations observed in the Little-parks type experiments in Kagome superconductors.
报告人简介：
Congjun Wu received his Ph.D. in physics from Stanford University in 2005, and did his postdoctoral research at the Kavli Institute for Theoretical Physics, University of California, Santa Barbara, from 2005 to 2007. He became an Assistant Professor in the Department of Physics at the University of California, San Diego in 2007, an Associate Professor in 2011, and a Professor in 2017. In 2021, he became a Chair Professor at School of Science, Westlake University. He was selected as a New Cornerstone Investigator in 2023, elected to a Fellow of American Physical Society in 2018, and awarded the Sloan Research fellowship in 2008. His research interests are exploring new states of matter and reveling their organizing principles, including quantum magnetism, superconductivity, topological states, mathematical physics, and the numerical method of quantum Monte Carlo simulations.
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报告人：Xing Wei，北京师范大学
时间：3月28日（周四）15:30
单位：北京大学物理学院
地点：KIAA-Auditorium
摘要：
I will report on my recent projects about tide and magnetic field of celestial bodies such as star, exoplanet and exomoon. The projects are as follows. (1) stellar magnetic dynamo: field-rotation relation in anisotropic rotating turbulence; (2) stellar oblique rotator: why solar radiative zone is in uniform rotation; (3) stellar wave transmission: can internal waves transmit at the interface of radiative and convective zones; (4) magnetic tide: ohmic dissipation needs to be taken into account for orbital evolution; (5) tidal resonance: the resonance of tidal wave and orbital motion; (6) exoplanet's inflation: radius anomaly of hot Jupiters; (7) exomoon's retention: where to detect exomoons.
报告人简介：
Xing Wei is professor at BNU. He studied BS at Tsinghua and PhD at Cambridge then worked at ETH, Gottingen, Princeton and SJTU before joining BNU.
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报告人：Prof. Junsuk Rho，Pohang University of Science and Technology (POSTECH), Korea
时间：3月28日（周四）15:00
单位：北京大学物理学院
地点：物理大楼西563会议室
摘要：
In this talk, I will show the recent unique demonstration of metasurfaces for successful miniaturization and performance acceleration of optical components and devices such as metalens-integrated camera/endoscope, full space dynamic structured light imaging, smart labelling and more. Then, I will discuss the recent approach for effective and efficient design of metasurfaces, and three low-cost manufacturing methods: 1) nanoimprinting with high-refractive-index dielectric particle embedding resin (PER), 2) bandgap engineering of hydrogenated amorphous silicon (a-Si:H), and 3) atomic-layer coating on imprinted resin. a-Si, TiO2, and ZrO2 PERs are used for metasurfaces at infrared (940 nm), visible (532 nm), and ultraviolet (325 and 248 nm), respectively; measured efficiencies reach 47% (940 nm), 91% (532 nm), 72% (325 nm), and 49% (248 nm). PER metasurfaces with an inverse design provide 3D, full-color holography at visible. The bandgap of a-Si:H is engineered to suppress optical losses, realizing metasurface efficiencies of 42% (450 nm), 65% (532 nm), and 75% (635 nm). We deposit an atomic layer on resin for 12-inch metasurfaces, achieving measured efficiencies of 61% (450 nm), 78% (532 nm), and 65% (635 nm). Finally, the recent development of mass production and manufacturing of metausrfaces and nanophotonic structures, and future direction with a bigger vision will be discussed.
报告人简介：
Prof. Rho is a Mu-Eun-Jae (无垠斋) Endowed Chair Professor and Young Distinguished Professor at Pohang University of Science and Technology (POSTECH), Korea, with a joint appointment in the Department of Chemical Engineering, Mechanical Engineering, and Electrical Engineering. He received his Ph.D. at the University of California, Berkeley (2013), M.S. at the University of Illinois, Urbana-Champaign (2008) and B.S. at Seoul National University, Korea (2007) all in Mechanical Engineering. Prior joining POSTECH, he conducted postdoctoral research in Materials Sciences Division & Molecular Foundry at Lawrence Berkeley National Laboratory, and also worked as a principal investigator (Ugo Fano Fellow) in Nanoscience and Technology Division & the Center for Nanoscale Materials at Argonne National Laboratory. Prof. Rho has authored and co-authored more than 300 high-impact journal papers including Science and Nature. He is also the recipients of several notable honors and awards such as US Department of Energy Argonne Named fellowship (2014), Korean Presidential Early Career Award for Scientists and Engineers (2019), Springer-Nature MINE Young Scientist Award (2020), Elsevier MEE/MNE Young Investigator Award and Lectureship (2020), Member of the Young Korean Academy of Science and Technology (Y-KAST) (2020), Associate Member of the National Academy of Engineering of Korea (NAEK) (2022), NAEK Young Engineers Award (2022), Hong Jin-Ki Creator Award (2022), Fulbright Visiting Scholar Fellowship (2022), Northwestern Simpson Fellowship (2022), Northwestern Eshbach Fellowship (2023), Clarivate Highly Cited Researcher (2023). He serves 14 editorial positions including Light: Science and Applications (Springer-Nature), Microsystems and Nanoengineering (Springer-Nature), npj Nanophotonics (Springe-Nature) and Nanophotonics (De Gruyter).
更多报告信息：
封面图片来源：https://zhuanlan.zhihu.com/p/510176721
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