三種新型量子效應(yīng)、超重原子核、超構(gòu)表面光場(chǎng)調(diào)控 | 本周物理講座

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報(bào)告人：Micha? Kowal，National Centre for Nuclear Research

時(shí)間：5月19日（周二）16:00

單位：中國(guó)科學(xué)院理論物理研究所

地點(diǎn)：南樓6520

摘要:

We demonstrate that hot superheavy nuclei do not retain spherical shapes, as traditionally assumed, but instead equilibrate in deformed—often oblate or triaxial—configurations at finite excitation energy. This behavior arises from a mechanism analogous to the Jahn--Teller effect: spherical systems exhibit high single-particle degeneracy near the Fermi surface, causing their shell corrections to damp out significantly faster with temperature than those of deformed shapes. Using a finite-temperature framework, we reveal a thermally induced inversion of the potential-energy landscape in the Z=118-120 region, where deformed minima become energetically favored at U ≈ 30-50 MeV. This shape inversion fundamentally alters the competition between neutron evaporation and fission. We derive a deformation-dependent correction to the survival probability, revealing a systematic bias in estimates based on spherical ground-state properties.

Our results identify a finite-temperature structure effect that calls for a revision of current models of superheavy nucleus synthesis and decay.

報(bào)告人簡(jiǎn)介:

Prof. Micha? Kowal is a theoretical physicist. His scientific interests include the prediction of cross-sections (synthesis probabilities) for existing and planned super-heavy nuclei, as well as stability analysis, including the calculation of lifetimes for the heaviest nuclei. He obtained his Master’s degree and Ph.D. in Physics from Maria Curie-Sklodowska University in 1999 and 2004, respectively. He is currently a professor and the head of the Department of Theoretical Physics at the National Centre for Nuclear Research, Poland.

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報(bào)告人：周稀楠，Kavli Institute for Theoretical Sciences, UCAS

時(shí)間：5月20日（周三）10:00

單位：中國(guó)科學(xué)院理論物理研究所

地點(diǎn)：南樓6620

摘要:

In this talk, I will introduce a framework utilizing zero-dimensional defects to analyze light-light-heavy-heavy (LLHH) correlators in conformal field theories. I will apply this formalism specifically to giant graviton correlators in N=4 super Yang-Mills. By combining this defect perspective with analytic bootstrap techniques, I will show how we can completely determine infinitely many four-point correlators at strong coupling. Furthermore, I will highlight a partially broken, higher-dimensional hidden symmetry that packages these correlators into a single generating function which also persists at weak coupling. I will also explain how a systematic operator product expansion analysis allows us to extract nontrivial dynamical information, including the complete spectrum of anomalous dimensions for double-particle operators. Finally, I will demonstrate that this zero-dimensional defect formalism extends far beyond supersymmetry, providing a naturally nonperturbative description for LLHH correlators in any general CFT by reducing four-point conformal blocks to defect two-point blocks in the heavy limit.

報(bào)告人簡(jiǎn)介:

Xinan Zhou is a faculty member at the Kavli Institute for Theoretical Sciences (UCAS) and the recipient of the 2023 ICTP Prize. His research focuses on high energy physics, particularly the AdS/CFT correspondence, conformal bootstrap, scattering amplitudes, and quantum gravity. He received his undergraduate degree from the University of Science and Technology of China and earned his PhD from the C. N. Yang Institute for Theoretical Physics at Stony Brook University in 2018. Prior to his current role, he was a postdoctoral fellow at the Princeton Center for Theoretical Science from 2018 to 2021.

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報(bào)告人：李勇，海南大學(xué)

時(shí)間：5月20日（周三）10:00

單位：中國(guó)科學(xué)院理論物理研究所

地點(diǎn)：南樓6520

摘要:

與自身鏡像無法通過平動(dòng)和轉(zhuǎn)動(dòng)重合的分子被稱為手性分子。手性分子和它的鏡像互為手性異構(gòu)體。雖然手性異構(gòu)體有許多相同的物理性質(zhì)，但是它們卻具有完全不同的化學(xué)性質(zhì)和藥理功能。因此手性分子的研究在醫(yī)藥方面具有非常重要的意義。從本世紀(jì)初，人們開始研究基于電偶極相互作用形成的循環(huán)三能級(jí)手性分子模型。在這樣的模型中，左右手性分子將有依賴于手性的不同量子性質(zhì)，從而可以采用量子力學(xué)的方法來進(jìn)行手性分子的分離、檢測(cè)和轉(zhuǎn)化。本報(bào)告將介紹該領(lǐng)域的理論與實(shí)驗(yàn)進(jìn)展，以及匯報(bào)我們?cè)谶@方面的主要研究工作。

報(bào)告人簡(jiǎn)介:

李勇，海南大學(xué)物理與光電工程學(xué)院、理論物理研究中心教授。長(zhǎng)期從事光與原子(分子)系綜相互作用的量子物理與量子信息、微納機(jī)械振子的冷卻與量子性質(zhì)以及手性分子檢測(cè)分離與轉(zhuǎn)化的理論研究。發(fā)表SCI 論文 160多篇，含Phys. Rev. Lett.文章7篇、Science Advances 1篇，引用5000余次（web of science）。曾獲國(guó)家自然科學(xué)基金委優(yōu)秀青年科學(xué)基金項(xiàng)目資助，入選教育部長(zhǎng)江學(xué)者獎(jiǎng)勵(lì)計(jì)劃特聘教授，任中國(guó)物理學(xué)會(huì)量子光學(xué)專業(yè)委員會(huì)委員。

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報(bào)告人：徐昊偉，香港城市大學(xué)

時(shí)間：5月20日（周三）15:00

單位：北京大學(xué)物理學(xué)院

地點(diǎn)：西563會(huì)議室

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報(bào)告人：裘曉輝，國(guó)家納米科學(xué)中心

時(shí)間：5月20日（周三）15:00

單位：中國(guó)科學(xué)院物理研究所

地點(diǎn)：M樓249會(huì)議室

摘要：
基于表面合成技術(shù)，以原子精度制備的納米石墨烯（即平面稠環(huán)芳烴）已成為研究自旋相關(guān)量子現(xiàn)象的重要體系。通過調(diào)控分子尺寸、形狀及邊緣構(gòu)型等拓?fù)鋮?shù)，可以調(diào)節(jié)納米石墨烯體系中開殼層的未配對(duì)電子構(gòu)型與自旋多重態(tài)，從而獲得可定制化制備的量子自旋結(jié)構(gòu)。掃描隧道顯微鏡與非接觸原子力顯微鏡為表征該類材料的結(jié)構(gòu)、電子及自旋特性提供了關(guān)鍵技術(shù)手段，為新型量子物態(tài)的實(shí)驗(yàn)研究奠定了重要基礎(chǔ)。

報(bào)告人簡(jiǎn)介：
裘曉輝，國(guó)家納米科學(xué)中心研究員。1992 年畢業(yè)于吉林大學(xué)化學(xué)系，2000年在中科院化學(xué)所獲得博士學(xué)位。之后于美國(guó)加州大學(xué)Irvine分校，IBM公司中心研究部、俄亥俄州立大學(xué)進(jìn)行博士后研究。2006年進(jìn)入國(guó)家納米科學(xué)中心。2014年獲國(guó)家杰出青年基金。迄今已發(fā)表論文200余篇。作為負(fù)責(zé)人先后承擔(dān)了科技部納米科技重點(diǎn)專項(xiàng)，基金委重大科研儀器設(shè)備研制項(xiàng)目、中科院前沿科學(xué)重大突破擇優(yōu)支持項(xiàng)目等。

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報(bào)告人：李英英，Institute of High Energy Physics, Chinese Academy of Sciences

時(shí)間：5月21日（周四）10:30

單位：中國(guó)科學(xué)院理論物理研究所

地點(diǎn)： 南樓6420

摘要：

Quantum simulation in High Energy Physics (HEP) has advanced significantly in recent years. Nevertheless, further development of a comprehensive simulation framework remains an important challenge. In this talk, I will first highlight the essential role of quantum computing in HEP and review recent progress in the field. I will then discuss the impact of gauge redundancies on quantum simulations of quantum field theories, with particular emphasis on digitization—the encoding of field variables into qubits. Finally, I will present quantum algorithms for the efficient preparation of initial states in quantum field theory simulations.

報(bào)告人簡(jiǎn)介：
Ying-Ying Li is an Associate Professor at the Institute of High Energy Physics (IHEP) and a Simons Emmy Noether Fellow at the Perimeter Institute for Theoretical Physics in Canada. She received her Ph.D. from HKUST in 2019, followed by postdoctoral research at Fermilab (2019–2022) and an Assistant Professorship at USTC (2022-2024). Dr. Li is the principal investigator of several research projects, including the NSFC Young Scientists Fund (Categories B and C) and a National Key R&D Program Young Scientist Project. Her research focuses on developing first-principles quantum computing frameworks for particle physics, aiming to provide new tools for studying non-perturbative dynamical processes at colliders.

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報(bào)告人：張潘，Institute of Theoretical Physics, Chinese Academy of Sciences

時(shí)間：5月21日（周四）15:00

單位：中國(guó)科學(xué)院理論物理研究所

Zoom: 842 4794 6637

Passcode: 411486

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報(bào)告人：Ningchen Sun，中國(guó)科學(xué)院大學(xué)

時(shí)間：5月21日（周四）15:30

單位：北京大學(xué)物理學(xué)院

地點(diǎn)：KIAA-auditorium

摘要：

Core-collapse supernovae (CCSNe) are spectacular explosions of dying massive stars and play significant roles in various astrophysical processes. It is a key topic, and still a major difficulty, to determine the progenitors of different types of CCSNe. in this talk, l will describe the general understanding on this topic from past studies and introduce our recent work in this field on a wide range of CCSN types using a combination of different techniques. Our main finding is that interacting binaries play ubiquitous roles in almost all types of CCSNe, from the H-rich Type ll-P to the H-poor Types llb/lb/lc as well as those types with strong interaction with circumstellar material. Future large-scale surveys with high spatial and temporal resolutions (such as Euclid, CSST, LSST and GOTTA) will better reveal the progenitors of CCSNe in the golden era of time-domain astronomy.

報(bào)告人簡(jiǎn)介：
Dr. Ning-Chen Sun obtained his PhD in 2018 at Peking University. He then carried out his postdoctoral research at the University of Sheffield from 2018 to 2022. After that he joined the University of Chinese Academy of Sciences as an assistant professor. His recent research focuses on supernovae and their progenitors.

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報(bào)告人：Yuriy Makhlin，L. D. Landau Institute for Theoretical Physics, Russian Academy of Sciences

時(shí)間：5月21日（周四）16:00

單位：中國(guó)科學(xué)院理論物理研究所

Zoom: 842 4794 6637

Passcode: 411486

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報(bào)告人：周磊，復(fù)旦大學(xué)

時(shí)間：5月22日（周五）16:00

單位：清華大學(xué)物理系

地點(diǎn)：物理樓天行報(bào)告廳

摘要:

自由調(diào)控電磁波在基礎(chǔ)理論和實(shí)際應(yīng)用(信息、能源、國(guó)防）兩方面均有重大意義。然而自然材料對(duì)電磁波的調(diào)控能力十分有限。過去二十余年間，利用亞波長(zhǎng)人工微結(jié)構(gòu)構(gòu)建的超構(gòu)材料原則上可具有任意的介電常數(shù)和磁導(dǎo)率，實(shí)現(xiàn)了遠(yuǎn)超自然材料的卓越電磁調(diào)控能力。其中，最具突破性的進(jìn)展之一是超構(gòu)表面的出現(xiàn)——這種由人工微結(jié)構(gòu)按照特定方式排列而成的平面型超構(gòu)材料，徹底改變了光場(chǎng)調(diào)控的范式。與超構(gòu)材料不同，超構(gòu)表面利用電磁波在人工微結(jié)構(gòu)上透/反射時(shí)的“界面相位”調(diào)控電磁波，因而具有超薄、易制備、高集成、低損耗等突出優(yōu)勢(shì)，一經(jīng)提出即成為納米光學(xué)的研究前沿。本報(bào)告將系統(tǒng)回顧從“界面相位”的提出到“平面光學(xué)”領(lǐng)域的建立過程，并對(duì)該領(lǐng)域的未來發(fā)展方向進(jìn)行展望。

報(bào)告人簡(jiǎn)介:

周磊，復(fù)旦大學(xué)副校長(zhǎng)，美國(guó)光學(xué)學(xué)會(huì)/美國(guó)物理學(xué)會(huì)/中國(guó)光學(xué)學(xué)會(huì)會(huì)士。1997年于復(fù)旦大學(xué)物理學(xué)系獲博士學(xué)位, 1997-2000年在日本東北大學(xué)金屬材料研究所從事博士后研究，2000-2004年在香港科技大學(xué)擔(dān)任訪問學(xué)者，2004年加入復(fù)旦大學(xué)，歷任物理學(xué)系副主任、系主任，復(fù)旦大學(xué)副校長(zhǎng)，未來信息創(chuàng)新學(xué)院院長(zhǎng)（兼）。長(zhǎng)期在微納光學(xué)領(lǐng)域從事研究工作，在Nat. Mater., Nat. Nano., PRL, PRX, Light: Sci. & Appl.等期刊上發(fā)表論文250多篇，論文被引超2.7萬次，H-index為70（谷歌學(xué)術(shù)），連續(xù)6年入選科睿維安全球高被引學(xué)者（2019-2024）及愛思唯爾中國(guó)高被引學(xué)者（2020-2025）。以第一完成人獲國(guó)家自然科學(xué)二等獎(jiǎng)、上海市自然科學(xué)一等獎(jiǎng)、上海市自然科學(xué)牡丹獎(jiǎng)、上海市科技精英（提名獎(jiǎng)）等榮譽(yù)。150余次在重要國(guó)際會(huì)議上作大會(huì)/主旨/邀請(qǐng)報(bào)告。擔(dān)任Photonics Insights和Optics and Photonics Research的共主編。主持科技部重點(diǎn)研發(fā)、基金委創(chuàng)新研究群體等項(xiàng)目。曾8次獲評(píng)復(fù)旦大學(xué)本專科畢業(yè)生“我心目中的好老師”（5次正獎(jiǎng)，3次提名獎(jiǎng)），其主講的《電動(dòng)力學(xué)》課程入選首批國(guó)家一流本科課程，獲國(guó)家級(jí)教學(xué)成果二等獎(jiǎng)（3/15、2023），上海市教學(xué)成果特等獎(jiǎng)（3/10、2022）等。

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