3/13
自然、天災、政治、知識： 從里斯本大地震(1755)講起
陳正國 研究員兼副所長 / 中央研究院 歷史語言研究所
4/17
量力風華，百年一瞬
高崇文 教授 / 中原大學 物理學系
4/24
關於DEI的文化戰爭
王俐容 教授 / 國立中央大學 通識教育中心‧客家語文暨社會科學學系
時間：3月20日(四) 10：30 / Time: 10h30 Thursday the 20th of March 2025
題目：Nonrelativistic multiscale systems with Effective Field Theories
講者：Prof. Nora Brambilla
服務單位：Technical University Munich, Germany
地點：本校科學三館4樓 SC427會議室 / Venue: SC427, Science Building 3, NYCU
摘要：
Nonrelativistic bound states lie at the core of quantum physics,
permeating the fabric of nature across diverse realms, spanning particle
to nuclear physics, and from condensed matter to astrophysics. These
systems are pivotal in addressing contemporary challenges at the forefront
of particle physics. Characterized by distinct energy scales, they serve
as unique probes of complex environments. Historically, their
incorporation into quantum field theory was fraught with difficulty until
the emergence of nonrelativistic effective field theories (NREFTs).
In this colloquium, we delve into the construction of a potential NREFT
(pNREFT),a framework that directly tackles bound state dynamics
reimagining quantum mechanics from field theory. Focusing on heavy
quarkonia, pNRQCD facilitates systematic definitions and precise
calculations for high-energy collider observables. At the cutting edge, we
investigate nonrelativistic bound states in intricate environments, like
the newly discovered exotics X, Y, Z above the strong decay threshold and
the behavior in out-of-equilibrium scenarios, such as quarkonium
suppression in a Quark Gluon Plasma or dark matter interactions in the
early universe. Our ability to achieve precision calculations and control
strongly interacting systems is closely linked to bridging perturbative
methods with nonperturbative tools, notably numerical lattice gauge
theories.
時間：3月6日(四) 13：20 ~ 15：10
題目：Top quark entanglement at CMS experiment
講者：陳凱風 特聘教授
服務單位：國立臺灣大學 物理學系
地點：本校科學三館1樓 SC162
時間：2月27日(四) 13：20 ~ 15：10
題目：Machine-learning enhanced quantum state tomography and its applications to the gravitational wave detectors
機器學習增強量子態斷層掃描，與其在重力波探測器上的應用
講者：李瑞光 特聘教授
服務單位：國立清華大學 電機光電工程所
地點：本校科學三館1樓 SC162
題目：Unraveling Nanoscale Stimulus Dynamics in Complex Material Systems: Insights from Scanning Probe and Phase-Field Modeling
講者：劉懿德 博士後研究員 Dr. Yi-De Liou, Postdoc
服務單位： Department of Physics, National Cheng Kung University
地點：本校科學三館1樓 SC102會議室
摘要：
Understanding how external stimuli, such as electric field, mechanical strain, and light, induce dynamic changes in the physical properties of complex material systems is a central challenge in condensed matter physics. Systems like complex oxides, heterostructures, and 2D materials exhibit emergent phenomena—such as ferroelectricity, magnetism, and ultrafast photovoltaic effects—that arise from intricate couplings among electronic, structural, and magnetic degrees of freedom. These phenomena provide a rich platform for exploring fundamental physics and offer pathways to novel device applications. However, the underlying mechanisms driving these nanoscale stimulus dynamics and their connection to mesoscale behaviors remain elusive.
This presentation investigates an integrated approach that combines scanning probe microscopy (SPM) and phase-field modeling to uncover the physics governing these dynamic processes. SPM techniques deliver nanoscale resolution, enabling detailed characterization of domain evolution, spatial variations in conductivity, elastic moduli, and carrier dynamics under external stimuli. Complementary phase-field modeling captures the underlying physical principles linking nanoscale interactions to mesoscale phenomena, including domain wall dynamics, polarization switching, and strain-mediated coupling effects. Together, these methods enable the prediction and design of emergent properties, such as non-volatile domain switching and ultrafast photovoltaic responses, in ferroic and phase diverse systems.
Integrating experimental and theoretical methodologies advances our understanding of the mechanisms governing complex material systems under external stimuli. These findings not only deepen our knowledge of condensed matter physics but also open new opportunities to harness emergent phenomena for high-speed, high-density, and energy-efficient devices. Building on these insights, the presentation will outline future directions to expand these interdisciplinary approaches, with a particular focus on uncovering novel physics in strongly correlated and low-dimensional systems.
時間：12月18日(三) 12：00 ~ 13：20
題目：Unraveling AGN Jets and Black Hole Accretion Across Multiple Scales
講者：蘇恭毅 博士後研究員 Dr. Kung-Yi Su, BHI Fellow
服務單位： Black Hole Initiative, Harvard University
地點：本校科學三館3樓 SC353-2會議室
摘要：
AGN feedback poses a multiscale challenge, intertwined with significant disparities across the diverse length and time scales inherent in galaxy physics and the dynamics of black hole accretion disks. In this presentation, we explore our comprehensive investigation of AGN jets and black hole accretion, spanning from the galaxy scale to the black hole event horizon, with the ultimate goal of unifying the underlying physics across these scales.
At the galactic scale, we conduct an in-depth study of the physical variations of AGN jets using isolated galaxy simulations, ranging from L* galaxies to massive cluster ellipticals. We identify the conditions under which jet models effectively quench massive galaxies and their corresponding observational signatures. Notably, we reveal the critical role of cosmic rays in jets and highlight significant variations arising from different cosmic ray launching models.
At the intermediate scale, we employ a suite of idealized simulations centered on the black hole vicinity. By resolving the gravitational capture of gas by the black hole, we examine the detailed interplay between AGN jets and black hole accretion, deriving an analytical model to describe jet propagation and the self-regulation of black hole growth as functions of black hole mass, feedback models, and gas properties. This model points to a low feedback efficiency upper limit required for the formation of supermassive black holes at high redshift, as uncovered by JWST observations.
Finally, we outline our ongoing efforts to integrate the galaxy scale and black hole horizon scale into a unified simulation framework that leverages a novel multi-zone method to track bidirectional gas flows.
時間：12月11日(三) 12：00 ~ 13：20
題目：Manipulating elementary excitations in functional quantum materials using resonant X-ray techniques
講者：曾奕 博士後研究員 Dr. Tseng Yi
服務單位：Deutsches Elektronen Synchrotron, Free-Electron Laser Hamburg
地點：本校科學三館3樓 SC353-2會議室
摘要：
The increasing demand and interests of quantum materials, as well as their intriguing macroscopic manifestation of collective phenomena and exotic properties, have led to unprecedented opportunities for materializing these emergent properties into functional devices, e.g. high-temperature superconductivity, quantum Hall effect, ferroelectricity, etc. In this vein, characterizing the underlying physics highlights a hallmark and unique realization in condensed matter physics, both from a fundamental as well from an applied perspective. In this talk, I will present studies using resonant X-ray spectroscopy techniques on elementary excitations in a number of quantum materials, specifically low-dimensional transition-metal magnets. Such experimental probes are sensitive to all electron degrees of freedom, i.e. lattice, spin, orbital and charge, capable of revealing unique information about the microscopic electronic interactions that are vital to the low-energy Hamiltonian. In addition to the aforementioned research achievements and present focus, future prospect including the ultrafast time control of electronic dynamics will be discussed.
時間：12月12日(四) 13：20 ~ 15：10
題目：Multi-messenger signals from magnetized core-collapse supernovae
講者：潘國全 副教授
服務單位：國立清華大學 天文研究所
地點：本校科學三館1樓 SC157
摘要：
Core-collapse supernovae (CCSNe) are among the most explosive events in the universe and are the birthplaces of neutron stars and stellar-mass black holes under extreme conditions. CCSNe are also ideal multi-messenger sources, expected to be detected not only through electromagnetic waves but also via neutrinos and gravitational waves.
In this talk, I will present the latest results from our multi-dimensional supernova simulations with self-consistent neutrino transport. In particular, I will focus on how magnetic fields and stellar rotation affect the explosion engine and multi-messenger signals. I will also comment on further searches for gravitational waves from core-collapse supernovae.
時間：11月28日(四) 13：20 ~ 15：10
題目：Probing entanglement dynamics on NISQ computers
講者：許琇娟 副教授
服務單位：國立政治大學 應用物理研究所
地點：本校科學三館1樓 SC157
摘要：
The quench dynamics of the Su-Schierffer-Heeger (SSH) chain is simulated on IBM Quantum computers. The second-order Rényi entanglement entropy, the twist order parameter and the Berry phase are calculated and shown persistent oscillations. Through error mitigation techniques, including global depolarizing error ansatz and postselection based on symmetry constraints, the simulation results match closely to the exact solution. Along with this research, a software tool is developed for effective simulation of entanglement entropy and a patent for monitoring quantum computers is granted.
時間：10月17日(四) 13：20 ~ 15：10
題目：Cosmic Ray Feedback in the Universe: Fermi Bubbles and Odd Radio Circles
講者：楊湘怡 副教授
服務單位：國立清華大學 天文研究所
地點：本校科學三館1樓 SC157
摘要：
Relativistic jets from supermassive black holes (SMBHs) are vital drivers of massive galaxy properties, and cosmic rays (CRs) within SMBH jets have shown to be a key ingredient in the process. It is therefore crucial to model the effects of CRs self-consistently in numerical simulations. In this talk, I will present how we could apply 3D CR-magnetohydrodynamic (MHD) simulations to understand enigmatic phenomena in the Universe, including the Fermi bubbles within the Milky Way Galaxy, as well as the newly discovered odd radio circles (ORCs). Our investigations suggest that both phenomena could be explained by powerful jet activity of SMBHs.
多元領域與人才
特色發展之實驗室及專精領域
嚴謹之課程架構以培養學生具研究能力
積極培養學生具國際化素養及視野