Jets, abundantly observed at high-energy colliders, carry information of underlying events, hard dynamics from both strong and weak interactions, and parent particles that produce jets. Study of jets is crucial for understanding physics within the Standard Model and for searching new physics. In this talk I will briefly explain how to construct jets and how to extract physics from jet structures.
Brief biography: Hsiang-nan Li received his PhD from State University of New York at Stony Brook in 1992, then became a faculty member of National Chung-Cheng University and National Cheng-Kung University, and joined Academia Sinica as a Research Fellow since 2001. His research interest focuses on perturbative quantum chromodynamics for heavy flavor physics and collider physics.
Quentin was also P.I. for the UKST H-alpha survey of the Southern Galactic Plane. Research activities are mainly but not exclusively associated with Wide Field Astronomy, including large-scale redshift surveys, low-surface brightness galaxies, supernova remnants and especially Planetary Nebulae. He has supervised and co-supervised a significant number of PhD, MSc and honours students to successful completion and is always keen to attract students. Quentin is currently on the IAU working group on planetary nebulae. He also heads both the H-alpha international survey consortium and the associated 'MASH' Planetary nebulae team. He also has a life-long interest in antiquities and a strong interest in Chinese Bronze artefacts.
The Alpha Magnetic Spectrometer (AMS) is a particle spectrometer on board of the International Space Station. It measures the charge, energy and momentum of charged cosmic rays with unprecedented precisions from 1GV to a few TV in rigidity. AMS has collected and analyzed more than 100 billion cosmic ray events during 6 years of operation since May 2011. In this talk we report the latest AMS measurements of the cosmic ray spectra of electron, positron, proton, antiproton, and light nuclei, including He, Li, Be, B, and C, O. Unexpected characteristics of the spectra are observed. They provide important new inputs for the study of fundamental physics as well as understanding the mechanism of cosmic ray acceleration and propagation.
Yuan-Hann Chang is a professor in the Physics Department of National Central University, Chung-Li, Taiwan. He received his PhD from the Massachusetts Institute of Technology. His professional interests are experimental particle physics and astro-particle physics. He has done research in Mark-J, L3, PHOBOS, CMS, NCT, and AMS experiments. He is currently a member of the AMS collaboration.
Prof. Chen is a nuclear theorist. He is perhaps most well known for his work on nuclear effective theory and its great simplification on weak interaction processes in nuclear physics, which was used by the SNO collaboration in their Nobel prize winning experiment to solve the solar neutrino problem. In addition, Prof. Chen also has highly cited work on the cosmological constant problem, lattice QCD and quantum phases. Prof. Chen has more than one hundred papers so far. His work was recognized by a Dissertation in Nuclear Physics Award from the American Physical Society, Ta-Yu Wu research award from NSC, and two Gold-Jade Research Awards from NTU.
With Higgs boson discovery in 2012 at the Large Hadron Collider (LHC) at CERN, Geneva, no "New Physics" has emerged so far at the Energy Frontier, while Yukawa couplings of 3rd generation fermions (top, bottom, tau) were measured recently and found consistent with Standard Model. Surveying the terrain, we present the case for additional Yukawa couplings as a most-likely next New Physics, which could robustly explain the matter dominance of our Universe. The couplings may reveal themselves in the near future at the LHC experiments and the Belle II experiment that is coming on now, and perhaps in electron electric dipole moment. We may be at the dawn of a new "flavor era".
George Wei-Shu Hou holds an NTU Chair in the Physics Department since 2015. Receiving his Ph.D. at UCLA, he returned to NTU in 1992, after conducting theoretical research in Pittsburgh, Munich and PSI, Switzerland. He then initiated the NTU High Energy Physics experimental group. Recent significant honors are: Academic Award (2010, MOE), Academic Summit Project (2010-2015, NSC/MOST), National Chair (2012-2015, MOE).
None of us were consulted when the universe was created. And yet it is tempting to ask not only how the universe evolves, but also why, and could it be different. Our universe weights more than 1050 tons. What would be the simplest way to create it using minimal amount of matter? Would it require a comprehensive project plan, and if so, where was this plan written before the universe was born? Can we study the evolution of the universe by cosmological observations, and then “play the movie back” to the origin of time, or will something unavoidably prevent us from doing it? Why do we live in a 4-dimensional space-time? Why is the universe comprehensible? We will try to approach these and other similar questions and discuss how they may be answered in the context of the theory of the inflationary universe. We will also describe the latest observational results testing various aspects of this theory, including the Planck 2018 data, and the search for the primordial gravitational waves produced during inflation.
Recently an intriguing connection between quantum entanglement between micro-scopic degrees of freedom in a quantum theory and geometric properties of spacetime in the gravitational theory has been pointed out. This surprising perspective has leaded to new insights in the understanding of quantum information, and its relation with holography and the nature of spacetime. I will highlight some of these recent progress as well.
Andrei Linde was born in Moscow in 1948. He received his Bachelor of Science degree from Moscow State University and his PhD from the Lebedev Physical Institute in Moscow. He worked at CERN, Geneva, since 1989, and then moved to the United States in 1990, where he became Professor of physics at Stanford University. Linde is one of the main authors of the inflationary universe theory, as well as the theory of eternal inflation and inflationary multiverse. He has received various awards for his work on inflation, including the Dirac Medal, the Gruber Prize, the Fundamental Physics Prize, and the Kavli Prize. Linde is a member of the National Academy of Sciences and of the American Academy of Arts and Sciences of the USA.
March 26, 2019
Steven G. Louie Luise , UCB
Host: Guang-Yu Guo
Time: 2:20 pm -3:20 pm
Place: Room 104, CCMS-New Phys. building
The Fascinating Quantum World of Atomically Thin 1D & 2D Materials: Symmetry, Interaction and Topological Effects
Symmetry, interaction and topological effects, as well as environmental screening, dominate many of the quantum properties of reduced-dimensional systems and nanostructures. These effects often lead to manifestation of counter-intuitive concepts and phenomena that may not be so prominent or have not been seen in bulk materials. In this talk, I present some fascinating physical phenomena we discovered in recent studies of atomically thin one-dimensional (1D) and two-dimensional (2D) materials. A number of interesting and unexpected behaviors have been found – e.g., strongly bound excitons (electron-hole pairs) with unusual energy level structures and new topology-dictated optical selection rules; tunable magnetism and plasmonic properties; novel topological phases; correlated multi-particle excitations; etc. – adding to the promise of 1D and 2D materials for exploration of new science and valuable applications.
Professor Louie received his Ph.D. in physics from the University of California at Berkeley (UC Berkeley) in 1976. After having worked at the IBM Watson Research Center, Bell Labs, and U of Penn, he joined the UC Berkeley faculty in 1980, where he is professor of physics and concurrently a faculty senior scientist at the Lawrence Berkeley National Lab. He is a member of the National Academy of Sciences, the American Academy of Arts & Sciences, and the Academia Sinica (Taiwan), as well as a fellow of the American Physical Society (APS) and the American Association for the Advancement of Science. Among his many honors, he is recipient of the APS Aneesur Rahman Prize for Computational Physics, the APS Davisson-Germer Prize in Surface Physics, the Materials Theory Award of the Materials Research Society, the Foresight Institute Richard P. Feynman Prize in Nanotechnology, the U.S. Department of Energy Award for Sustained Outstanding Research in Solid State Physics, as well as Jubilee Professor of the Chalmers University of Technology in Sweden and H. C. Ørsted Lecturer of the Technical University of Denmark. Professor Louie’s research spans a broad spectrum of topics in theoretical condensed matter physics and nanoscience. He is known for his groundbreaking work on the ab initio GW method and for his seminal work on surfaces and interfaces, nanostructures, and reduced-dimensional systems.
The neutrino oscillation and their mass hierarchy (mass ordering) has been very interesting topics in particle physics. The experimental pursuit and discoveries have been quite fruitful in recent years for such elusive tiny neutral leptons.
In this talk I will introduce the underground Daya Bay reactor antineutrino experiment which discovered the non-zero 3rd mixing angle in April 2012 and their recent results after six years running. I will also give the status of the new initiative JUNO experiment to measure the mass ordering of neutrinos in the near future.
Prof. Yee Bob Hsiung received his bachelor degree (1976) at NTU Physics Department and Ph.D. (1986) in Physics at Columbia University.
He has been working on particle physics experiments of discovering direct CP violation in neutral kaon decays and rare K and B-meson decays, as well as LHC-CMS experiment to search for new physics (top and Higgs), and in recent years on Daya Bay neutrino oscillation experiment discovering none-zero 3rd mixing angle.
He was the co-spokesperson of KTeV experiment at Fermilab before he returned to NTU in 2002 and APS Fellow in 2000.
He received the Outstanding Scholar Awards from the Foundation for the Advancement of Outstanding Scholarship (2003-2008), and was the Physics Department chair and the President of PSROC in Taiwan.
Recently he received the 17th National Professorship of ROC in Taiwan from Ministry of Education. Also sharing the 2016 Breakthrough Prize in Fundamental Physics on Daya Bay experiment.
Modern nanoscale electronics encompasses many new and emerging sub-topics e.g. spintronics (magnetic memory, sensors, spin transistor), relativistic electronics (graphene, Weyl semimetals), topological electronics (topological insulators, Dirac-Weyl, quantum Hall), atomic electronics (nitrogen-vacancy-centers), molecular electronics (carbon nanotubes) and so forth.
In this talk, we will introduce recent advances in these topics as well as the underlying physics that support the fast development of research in these areas. The core concepts of non-equilibrium, size effects, perturbation, as well as gauge and Berry curvature are introduced. We also discuss the electronic environment in which all carrier transport takes place. The effect of ionic potential results in the band structure of metal, semiconductor and insulator. The effect of carrier interaction gives rise to electron gas, liquid and solid.
Seng Ghee Tan received his PhD (2006) and M.Eng (2001) from the National University of Singapore (NUS), and his B.Eng (1996) from the University of Malaya. He was a senior research fellow under the A-STAR of Singapore from 2006-2009. He later held the position of Assistant Professor with the NUS from 2009-2015 before leaving the NUS in 2015 to continue his career with A-STAR as a theoretical physicist until 2017. He was at the same time an editorial board member for the Scientific Reports (NPG). He is presently (2007 onwards) a Visiting Prof at the National Taiwan University (NTU).
In 2007, he predicted a physical effect known as the spin-orbit spin torque, and derived a modified-LLG equation [S.G. Tan et. al. arXiv: 0705.3502 (2007)] to support his prediction. The effect was confirmed by experiment in 2010, and is now used in the study of magnetic memory. In 2015, he predicted theoretically a conductivity correction to the 2D-spin Hall systems. In 2012, he wrote a book: “Introduction to the Physics of Nanoelectronics” (Woodheads Publishing, Elsevier). He has published over 160 journal papers in the emerging fields of spintronics, graphene, Dirac-Weyl, topological physics in materials and electronics. During his professorship with the NUS, he had supervised about 10 PhD students. He had taught many courses in quantum electronics (emerging), quantum transport in nanoscale devices (new materials), quantum spintronics, at both NUS (Singapore) and NTU (Taiwan).
Rechargeable energy storage devices, such as Li-ion batteries and supercapacitors, are at the heart of widely used electrical devices such as smartphones and electric vehicles. As the energy density of these devices steadily increases, safety concerns are growing. Toxic and/or explosive gases may evolve as a result of decomposition of the electrolyte and/or the electrode material and these gases are generally trapped in the cell. However, the characterization of assembled cells has been limited to measuring externally accessible parameters such as voltage, current and temperature. Thus, there was little information about the composition of the evolved gases and the mechanism of gas evolution.
This talk introduces a new way to measure the evolved gases from commercially available cells using Raman spectroscopy. This is made possible by designing external Raman cells for supercapacitors and Li-ion battery cells. Using those cells, we were able to identify evolved gas species and to track the partial pressures of individual gases in real time. We will also talk about the effects of harsh conditions such as high voltage and temperature on the gas evolution and electrochemical performance of the cells.
Prof. Son is an applied scientist and electrical engineer. His earlier work focused on Raman spectroscopy of carbon nanotubes and graphene. His main interest now is to expand Raman spectroscopy to more practical applications such as battery safety and stem cell research.
2003, BS, Electrical Engineering and Computer Science, MIT
2004, BS, Physics, MIT
2004, MEng, Electrical Engineering and Computer Science, MIT
2008, Ph.D, Electrical Engineering and Computer Science, MIT
2008-2011, Research staff member, Samsung Advanced Institute of Technology
2012~2015, Assistant Professor, School of Integrative Engineering, Chung-Ang University, Republic of Korea
2016~2017, Associate Professor, School of Integrative Engineering, Chung-Ang University, Republic of Korea
Unbiased supernova searches led to the recognition of the class of superluminous supernovae (SLSN) about one decade ago. These events can be a factor 100 more luminous than ordinary supernovae. Some SLSNe show narrow hydrogen lines and are likely powered by interaction with a dense circumstellar medium. In one case, the progenitor star lost several solar masses of gas in the 30 years leading to the explosion; the reason for the extreme mass loss is not understood.
Other SLSNe do not show narrow lines, but show broad lines and are stripped of hydrogen. These features are difficult to explain in an interaction scenario. Another possibility is radioactive power, but the required mass of 56Ni can be larger than allowed by the light curve and the expectations of 56Ni synthesis. Power from a magnetar (highly magnetized pulsar) with a millisecond period can roughly explain light curves and spectra.
Roger Chevalier has been the W. H. Vanderbilt Professor of Astronomy at the University of Virginia since 1990. After obtaining his Ph.D from Princeton University in 1973, he joined the scientific staff of Kitt Peak National Observatory in Tucson, Arizona. He moved to the University of Virginia in 1979, where he was Astronomy Department chair during 1985-1988 and 1989-1992. His research has centered on theoretical studies of rapidly expanding astronomical sources, including supernovae, supernova remnants, gamma-ray bursts, pulsar wind nebulae, and galactic super-winds. Chevalier was chair of the science panel on Stars and Stellar Evolution for the 2010 astronomy decadal survey. His honors include Virginia's Outstanding Scientist Award (1991), the Dannie Heineman Prize for Astrophysics (1996), and election to the National Academy of Sciences (1996).
The quark model has been applied very successfully in describing the mesons and baryons and their properties. It is known that all the established mesons are made of a quark and an antiquark, while baryons are composed of three quarks. In principle, hadrons composed with more than three valence quarks are not prohibited by the fundamental theory of strong interactions, namely the so-called QCD. In this talk I'll examine the status of the multi-quark hadrons, including tetraquark mesons, pentaquark baryons and hexaquark states. I will also explain why the quark model often encounters a great challenge in understanding p-wave scalar mesons and p-wave baryons.
December, 1980 Ph.D. in Physics Purdue University, USA
July, 1973 M.S. in Physics National Tsing Hua University, Taiwan
July, 1971 B.S. in Physics National Cheng Kung University, Taiwan
Distinguished Research Fellow, Institute of Physics Academia Sinica
Full Research Fellow, Institute of Physics Academia Sinica
Visiting Professor, SUNY at Stony Brook
Visiting Professor, Brookhaven National Lab
Visiting Professor, SUNY at Stony Brook
Visiting Professor, Brookhaven National Lab
Visiting Professor, SUNY at Stony Brook
Visiting Expert, Academia Sinica
Visiting Scientist, Indiana University
Chester Davis Fellow, Indiana University
Research Associate, Brandeis University
Visiting Assistant Professor, Purdue University
Research Associate, Purdue University
6/1984-7/1984, 9/1988-10/1988, 8/1989-1/1990, 8/1991-10/1991, 9/2000-9/2001, 6/2009-5/2010
Research Collaborator, Brookhaven National Laboratory
Organizer of the CP parallel session of the XXVth International Conference on High Energy Physics
Editor, Chinese Journal of Physics
Editor-in-Chief, Chinese Journal of Physics
Physics Panel Committee of Natural Science Division, National Science Council 國科會自然處物理學門審議委員
Project Coordinator, National Science Council 國科會自然處物理學門審議人
Consultation Committee, National Science Council 國科會自然處諮議委員
Chairman of the Taiwan High Energy Experiment Planning Committee
Deputy Director, Institute of Physics, Academia Sinica
G. W. Tautfest Memorial Award, Purdue University
Chester Davis Fellowship, Indiana University
1988-1990, 1990-1992, 1992-1994, 1994-1996
Outstanding Research Award of National Science Council 國科會傑出獎
Fellow of Chinese Physical Society 中華民國物理學會會士
Academic Award, Ministry of Education 教育部學術獎
Special Research Fellow, National Science Council 國科會特約研究員
Citation Award of Chinese Journal of Physics
Outstanding Referee, American Physical Society
Time: 2:20 pm -3:20 pm
Place: Room 104, CCMS-New Phys. building
TO be Confirmed
Since the fortuitous discovery by Otto Stern and Walther Gerlach in 1922, electron spin has dominated many branches of condensed matter physics, especially spintronics and superconductivity. In addition to the interesting historical accounts, we will describe some of the recent development of pure spin current phenomena and spin orbit torque.
Chia-Ling Chien is the Jacob L. Hain Professor of Physics at The Johns Hopkins University. He received his BS in physics from Tunghai University (Taiwan), and his MS and PhD from Carnegie-Mellon University.
His current research interests include spintronics, pure spin current phenomena, and superconductors. He is a Fellow of the American Physical Society and a Fellow of the American Association for the Advancement of Science (AAAS). He is the recipient of the David Adler Award of the American Physical Society (2004) and the IUPAP Magnetism Award and Néel Medal (2015).
Time: 2:20 pm -3:20 pm
Place: Room 104, CCMS-New Phys. building
To be Confirmed
The enhancement of up-conversion luminescence (UCL) of rare earth doped up-conversion nanoparticles (UCNPs) in aqueous solution is particularly important and urgently required for a broad range of biomedical applications. Herein, an effective approach to achieve highly enhanced UCL from NaYF4:Yb3+, Tm3+ UCNPs in aqueous solution is presented.
We demonstrate that UCL of these UCNPs can be enhanced more than 104 fold by using a mesoporous silica low refractive index resonant waveguide grating (low-n RWG) in contact with aqueous solution, which makes it well-suited for biomedical applications. The structure parameters of the low-n RWG are tuned via rigorous coupled-wave analysis simulation to ensure strong local excitation field to form atop the TiO2 surface of the low-n RWG, where UCNPs are deposited. As the low-n RWG is excited by a near near-infrared laser to match its guided mode resonance (GMR) condition, UCL emitted from UCNPs is greatly enhanced thanks to the strong interaction between excitation local field and UCNPs. UCL emission of UCNPs can be further enhanced about two to four times when the UCL emission condition (wavelength and angle) matches with the GMR condition.
Furthermore, we show that the presence of biotin molecules atop of the low-n RWG can be easily detected through UCL emission generated from streptavidin-functionalized UCNPs with the help of the streptavidin-biotin specific binding. The results indicate that the low-n RWG has high potential for UCL bio-sensing and bio-imaging applications.
1. “Giant enhancement of upconversion fluorescence NaYF4:Yb3+,Tm3+ nanocrystals with resonant waveguide grating substrate”, ACS Photonics, 2, 530 (2015).
2. “Enhancing upconversion luminescence emission of rare earth nanophosphors in aqueous solution with thousands fold enhancement factor by low refractive index resonant waveguide grating”, ACS Photonics, DOI: 10.1021/acsphotonics.8b00494, (2018).
Ph.D. Degree: Department of Physics, University of Arizona, USA, 1984/08-1991/09
Master Degree: Institute of Optical Sciences, National Central University, Taiwan, 1982/09-1984/06
B.S. Degree: Department of Physics, National Central University, Taiwan, 1977/09-1981/06
Distinguished Professor, Department of Physics, National Chung Cheng University, Taiwan
Invited Professor, Laboratoire de photonique quantique et moléculaire, École normale supérieure de Cachan, France
Dean of College of Science, National Chung Cheng University, Taiwan
Visiting Professor, Department of Physics, University of British Columbia, Canada
Director, Graduate Institute of Opto-Mechatronics, National Chung Cheng University, Taiwan
Professor, Department of Physics, National Chung Cheng University, Taiwan
Associate Professor, Department of Physics, National Chung Cheng University, Taiwan
2009 Outstanding research award, National Chung Cheng University
2016 Distinguished Professor, National Chung Cheng University
Nanophotonics, Nonlinear Optics, Organic Electronics, Polymer Optics
Rotation is a wonderful thing in physics, and the Earth's rotation varies with time. How does it vary? Why? How do we know? What has NASA to do with it? What does it reveal about the Earth's mysteries? Come and hear the story.
B.S. Physics, National Taiwan University.
Ph.D. Earth Sciences, Scripps Institution of Oceanography, University of California, San Diego.
Honors and Awards
Excellence in Refereeing: J. Geophys. Res., Amer. Geophys. Union.
1991, 1992, 1994, 1995, 1996, 1998, 2000, 2003, 2004 (9 times)
NASA GSFC Outstanding Performance Awards.
Fellow, International Association of Geodesy.
Honorary Professorship, University of the Chinese Academy of Sciences, Beijing.
The Einstein Professorship, Chinese Academy of Sciences.
Adjunct Researcher, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan.
2006 ~ 2008
TSMC Outstanding Chair Professorship.
2009 ~ 2010
Foundation for the Advancement of Outstanding Scholarship Award.
Distinguished Research Fellow, Academia Sinica.
Major Fields of Interest
1. Global geophysics and planetary physics by way of (space) geodesy–Rotation dynamics; Gravitational variations; Free oscillations; Global sea level; Geophysical fluids changes.
2. Digital data analysis methodology and numerical techniques; Inverse theory.
趙丰博士為台灣大學物理系畢業、美國加州大學聖地牙哥校區 Scripps Institution of Oceanography 地球科學博士(1981)。在美國 NASA Goddard Space Flight Center 服務多年﹐任太空測地實驗室主任。2006年回到台灣，曾任中央大學地球科學院院長，和中央研究院地球科學研究所所長，現任該所特聘研究員。研究專長為地 球與行星動力學、重力學、地球物理與地震學等。
To be Confirmed
The large-scale structure of the Universe observed via galaxy redshift surveys contains valuable cosmological information, and it has been playing a major role to improve our understanding of the Universe. However, the observed large-scale structure appears distorted due to the observed systematics in the redshift determination, known as redshift-space distortions (RSD). Recently, the measurement of RSD is renewed with great interest as a probe of gravity on cosmological scales. In this talk, after reviewing the 'standard' RSD caused by the peculiar velocity of galaxies, I will discuss yet another distortion arising from general relativistic effects. Unique feature of the new distortion effects is demonstrated based on the simulated catalog taking a proper account of the relativistic effects, and detectability and implications to cosmology will be also discussed.
1993 B.A., School of Science, Department of Physics, Nagoya University
1995 M.S., Graduate school of Science, Division of particle and astrophysical sciences, Nagoya University
1998 Ph.D., Graduate school of Science, Division of particle and astrophysical sciences, Nagoya University
Fellowships and positions:
1998 – 1999 Research fellow, Faculty of Integrated Human Studies, Kyoto University
1999 – 2000 Research fellow, Research Center for the Early Universe, School of Science, The University of Tokyo
2000 – 2001 Research Fellow of Japan Society of Promotion of Science, Department of Physics, The University of Tokyo
2001 –2013 Assistant Professor, Research Center for the Early Universe, School of Science, The University of Tokyo
2013 – Associate Professor, Yukawa Institute for Theoretical Physics, Kyoto University
The 2016 Yukawa-Kimura prize, “exploration of precision nonlinear perturbation theory for gravitational evolution of structures in the universe”, Yukawa memorial foundation (18th Jan. 2017)
Prof. Taruya’s main research activities are the studies of the large-scale structure of the universe in the subject of observational cosmology. He has worked more particularly on the statistics and dynamics of large-scale structure both from the theoretical and observational point-of-view. Further, he has been working on several interdisciplinary topics relating to cosmology. Topics include statistical mechanics of self-gravitating system, gravitational-wave backgrounds, and measurements/characterization of exoplanets.