超重核、新型密度泛函、弦理論和場論、軸子宇宙學、QCD | 本周物理講座

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報告人：王寧，廣西師范大學

時間：12月30日（周二）10:00

單位：中國科學院理論物理研究所

地點：南樓6520

摘要:

本報告圍繞超重核在預形成與自發(fā)裂變過程中的結構效應展開，系統(tǒng)探討了超重元素合成的意義、路徑及其關鍵科學問題。針對熔合蒸發(fā)途徑，報告深入探討TDHF、ImQMD等模型對俘獲過程的動力學模擬，以及通用Wong公式、EBD2公式等俘獲截面的計算方法。研究指出，原子核基態(tài)形變、反應Q值、殼效應、正Q值中子轉移等因素均對壘下俘獲截面具有重要影響，而深度非彈性散射在合成119號及以上超重核時的影響亦不可忽視。報告進一步討論了原子核自發(fā)裂變過程中的有效隧穿壘（ETB），比較了不同模型對自發(fā)裂變半衰期的預測能力，并指出殼能隙以及衰變能對豐質子超重核自發(fā)裂變的關鍵作用。

報告人簡介:

王寧，廣西師范大學教授、廣西核物理與核技術重點實驗室主任、國家自然科學基金優(yōu)秀青年基金獲得者。主要從事重離子熔合反應、原子核質量等研究。提出了一個高精度的核質量模型，得到了同行的廣泛關注與好評；還提出了重離子熔合反應截面的通用Wong公式以及改進的量子分子動力學模型，為實驗合成新核素以及探索熔合機制提供了重要的理論支撐。

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報告人：王志偉，University of York

時間：12月30日（周二）14:00

單位：中國科學院理論物理研究所

地點：Lecture Hall 6620, South Building

Zoom Meeting ID: 844 0034 0762

Passcode: 727537

摘要:

In the framework of General Relativity,?the definition and interpretation of energy (mass) remains one of its most profound and enduring challenges. Two of the most widely recognized definitions are the ADM mass and the Komar mass: the ADM mass is defined based on the Hamiltonian principle,?while the Komar mass is constructed via Noether's principle. Although their definitional phylosophy are distinct,?they have been proven to be completely equivalent in stationary,asymptotically flat spacetimes. However, their specific relationship in dynamic spacetimes has remained unclear for fifty years. Our research focuses on the correlation between ADM energy and generalized Komar mass within asymptotically flat dynamic spacetimes. We demonstrate that a generalized Komar energy, constructed using an appropriately chosen asymptotic timelike vector field, is exactly equivalent to the ADM energy. This result extends the equivalence of ADM and Komar energy to more general dynamic scenarios, providing a powerful analytical tool for addressing energy problems in dynamic spacetimes involving compact objects (such as black holes).

報告人簡介:

Zhiwei Wang is a Postdoctoral Researcher at the University of York, UK. He received his PhD from the University of York in August 2020. Subsequently, he conducted postdoctoral research at the University of Lethbridge (Canada), the University of Warwick (UK), and the University of York (UK). His research primarily focuses on theoretical work regarding black hole thermodynamics, dynamic spacetimes, and quantum gravity phenomena. His relevant research results have been published as the first author in journals such as Nature Astronomy, Nature Communications,?and Physical Review D.

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報告人：肖煌煜，波士頓大學&哈佛大學

時間：12月30日（周二）15:00

單位：中國科學院理論物理研究所

地點：南樓6420

摘要:

I will discuss cosmological aspects of the QCD axion and more general axion-like particles. I will then show how axions can play a key role in well-motivated baryogenesis frameworks, strengthening their motivation beyond the strong CP problem. Next, I will introduce a simple axion–monopole model in which the axion dynamics induces an effective interaction between dark matter and dark energy. I will close with recent developments in cosmological signals of axion dark matter and prospects for future detection.

報告人簡介:

Huangyu Xiao obtained his PhD from the University of Washington in 2022. Then he moved to Fermilab and U chicago for his first postdoc, and recently joined Boston University and Harvard University in 2025 for his second postdoc. His recent research interests include cosmological probes of axions and particle physics model building to explain the origin of baryon asymmetry.

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報告人：張玉波，閩江學院

時間：12月31日（周三）10:00

單位：中國科學院物理研究所

地點: M830

摘要:

過渡金屬化合物因其d電子的關聯(lián)特性，常展現(xiàn)出奇異物理性質，這對廣泛應用的Kohn-Sham密度泛函理論構成了挑戰(zhàn)。傳統(tǒng)LDA/GGA泛函在預測此類材料性質時存在較大偏差，導致學界對DFT方法的可靠性存在廣泛質疑。近年來，SCAN meta-GGA泛函及其改進版本r2SCAN取得重要突破，對過渡金屬化合物的物性預測有了顯著進步，促使人們重新審視DFT在過渡金屬化合物中的適用性。本報告將介紹SCAN/r2SCAN泛函的基本原理，重點闡述它們在若干過渡金屬化合物研究中的進展及性能提升機制，并探討當前依然存在的挑戰(zhàn)。

報告人簡介:

張玉波博士，2006年本科畢業(yè)于山東大學，2012年獲得哈爾濱工業(yè)大學物理學博士學位。張博士先后在中國科學院上海硅酸鹽研究所、美國杜蘭大學孫建威/John Perdew教授團隊從事博士后研究工作。2018年回國加入南方科技大學張文清教授團隊，擔任研究副教授。2022年入職閩江學院開展獨立研究。張博士致力于復雜磁性材料的密度泛函理論研究。已發(fā)表論文69篇，H指數(shù)31，被引6000余次。

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報告人：陳璟怡，南京信息工程大學

時間：12月31日（周三）10:00

單位：北京大學物理學院

地點：物理大樓北547教室

騰訊會議：385-355-782

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報告人：張東良，馬克斯-普朗克復雜系統(tǒng)物理研究所

時間：12月31日（周三）10:30

單位：中國科學院理論物理研究所

地點：南樓6620

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報告人：Bartosz Pyszkowski，YITP, Kyoto University

時間：1月5日（周一）10:00

單位：中國科學院理論物理研究所

Zoom Meeting Meeting ID: 893 1198 4573

Passcode: 008904

摘要:

Following Polchinski and Strassler arXiv:hep-th/0109174 and our recent work arXiv:hep-th/2412.17784, I will discuss our ongoing study of high-energy pion scattering in a holographic hard-wall model of QCD. I will begin with a brief overview of the Polchinski--Strassler proposal before applying it to the holographic hard-wall model. The main focus is on comparing our predictions for the angular dependence of $\pi^{+} \pi^{-} \to \pi^{+} \pi^{-}$ scattering with experimental data. Having previously shown that our approach reproduces the constituent counting rule in QCD, we now find qualitative agreement with data in the high-energy fixed-angle regime. Time permitting, I will also comment on possible extensions to other processes and models, and attempts to ``prove'' the Polchinski--Strassler proposal.

報告人簡介:

Bartosz Pyszkowski is currently a Ph.D student of YITP at Kyoto University since 2022,before that,he obtained his master degree from Durham University in 2021 after he graduated from Warwick University in 2020. His research focuses mainly on holographic QCD and related aspects of holography.

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