ASIAA/CCMS/IAMS/LeCosPA/NTU-Phys/NTNU-Phys Joint Colloquia

February 26, 2019

Hsiang-nan Li , IOP-Academia Sinica

Host:  Xiao-Gang He
Time: 2:20 pm -3:20 pm
Place: Room 104, CCMS-New Phys. building
Title:
Introduction to jet physics 

Abstract

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 Bio

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.

March 05, 2019

 Yuan-Hann Chang ,  NCU-physics

Host:  Xiao-Gang He
Time: 2:20 pm -3:20 pm
Place: Room 204, CCMS-New Phys. building
Title:
Latest Results from the AMS experiment

Abstract

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.

Brief Bio

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.

live

March 12, 2019

  George Wei-Shu Hou ,  NTU-Phys

Host: Xiao-Gang He
Time: 2:20 pm -3:20 pm
Place: Room 104, CCMS-New Phys. building
Title:
Whither New Physics?
--- the Case for Extra Yukawa Couplings

Abstract

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".

Brief Bio

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).

Live Streaming and Video

March 19, 2019

Andrei Linde,  Stanford University

Host:  Yu-Ting Huang
Time: 2:20 pm -3:20 pm
Place: Room 104, CCMS-New Phys. building
Title:
Reverse Engineering the Universe

Abstract

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.

Brief Bio

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.

Live Streaming and Video

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
Title:
The Fascinating Quantum World of Atomically Thin 1D & 2D Materials: Symmetry, Interaction and Topological Effects

Abstract

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.
Brief Bio

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.

April 09, 2019

Hsiu-Hau Lin,  NTHU

Host:  Xiao-Gang He
Time: 2:20 pm -3:20 pm
Place: Room 104, CCMS-New Phys. building
Title:
Information Processor: Computer and the Brain

Abstract

Information may sound abstract to most physicists, except its confusing application to entropy in thermos statistics. Skipping the technical details, an effective information processor should contain two key functions: computation and storage. In this presentation, I would start with our recent breakthrough in magnetic random access memory (MRAM), explaining how spin current opens up brand new opportunity for the next-generation MRAM. Then, I would switch gear to discuss how our brains, presumably effective information processors, handle massive information from everyday life. Comparing similarities and differences between computers and our brains, it provides intriguing insights for building computers fed on information training and understanding our brains as well.

Brief Bio

Prof. Hsiu-Hau Lin received Ph.D. degree at UC Santa Barbara in 1998 and joined the faculty at National Tsing Hua University in 2000. In the past two decides, he has applied statistical-field techniques to various research topics including spintronics, quantum magnetism, superconductivity, evolutionary dynamics and neurosciences. He was awarded Ta-You Wu Fellow at National Center for Theoretical Sciences in 2003 and selected as Ten Outstanding Young Persons in 2006. Prof. Lin also devotes himself in education, receiving the prestigious ACE Awards (2013, 2014) from Open Courseware Consortium. He is currently holding distinguished professorship at NTHU, working hard on information processing mechanism in both physical and biological systems.

Live Streaming and Video

April 16, 2019

Ernest Ma,  UCR

Host:  Xiao-Gang He
Time: 2:20 pm -3:20 pm
Place: Room 104, CCMS-New Phys. building
Title:
New Insights on Dirac Neutrinos and Dark Matter

Abstract

In recent years, a new understanding has emerged that lepton number may be a discrete remnant of a gauge symmetry and yet neutrinos are strictly Dirac particles. It is further realized that this may be intimately connected to the symmetry which maintains the stability of dark matter. I will discuss these new insights and offer two recent specific example.

Brief Bio

Prof. Ernest Ma received his Ph.D. in Theoretical Particle Physics in 1970 from University of California, Irvine. He had research associate positions at various Universities before joining the University of Hawaii in 1977 as an Assistant Professor. He became a full professor there in 1985. From 1987 to present he has been a Professor (and Department Chair 1995-98) at the University of California, Riverside, CA.
Prof. Ma has 403 publications in international refereed journals, including 40 Physical Review Letters, of which 19 are single-authored. He has over 17,700 journal citations and is listed by INSPIRE among the all-time highly cited theory authors. Prof. Ma became a Fellow of the American Physical Society since 1996, and named as one of the inaugural Outstanding Referees of APS journals in 2008.

April 23, 2019

Takeshi Nakadaira,  IPNS(KHK)

Host:  Kai-Feng Chen
Time: 2:20 pm -3:20 pm
Place: Room 104, CCMS-New Phys. building
Title:
The J-PARC high-intensity neutrino beam

Abstract

Accelerator-based Long base-line neutrino experiments can measure the neutrino oscillations precisely, and can search for CP violation in lepton sector by comparing the neutrino beam measurement and the anti-neutrino beam measurement. The high intensity neutrino beam is essential for CP violation search. The J-PARC neutrino facility has the potential to provides Mega-watt class neutrino beam for the long base-line experiments. The latest results of the current J-PARC neutrino experiment, T2K, may be the hint of the large CP violation in lepton sector. The J-PARC accelerator and the neutrino beam facility will be upgraded aiming 1.3MW neutrino beam to enhance the sensitivity of CP violation search by T2K and the future project Hyper-K. The contents and the prospects of this improvement plans to realize the world highest neutrino intensity will be introduced.


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.
Education
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
Professional Experience
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

April 23, 2019

Yoshitaka Itow, ISEE/KMI,Nagoya University

Host:  Kai-Feng Chen
Time: 2:20 pm -3:20 pm
Place: Room 104, CCMS-New Phys. building
Title:
The Hyper-Kamiokande project

Abstract


Hyper-Kamiokande (Hyper-K), a straightforward extension of Super-Kamiokande, is expected to provide significant progress and new discoveries in particle and astroparticle physics. This will be realized by one order of magnitude increase in detector mass, improvements to photon-detection systems, and an envisioned J-PARC megawatt class neutrino beam. These improvements are expected to substantially enhance all ongoing physics programs at Super-Kamiokande and T2K. The J-PARC neutrino beam will provide accurate measurement of neutrino oscillations, targeting five-sigma discovery of CP violation in the lepton sector. As for the nucleon decay search, the sensitivity to the partial lifetime of proton decay p -> e + pi0 exceeds 10^35 years. The astrophysical neutrino program involves precise measurement of solar neutrino oscillations, matter effect, supernova burst, supernova relic neutrinos, and other astronomical sources. Hyper-K is a priority project listed in the Road Map 2017 of the Japanese Ministry of Education, Culture, Sports, Science and Technology. Herein, we present recent project status updates and milestones, i.e., construction begins in 2020 and commissioning begins in 2027.


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).

April  30, 2019

Yen‐Jie Lee ,  Department of Physics,MIT

Host:  Pao-Ti Chang
Time: 2:20 pm -3:20 pm
Place: Room 104, CCMS-New Phys. building
Title:
Probing the Trillion Degree Quark Soup

Abstract

Quantum Chromodynamics (QCD) is a complete theory of the strong interaction. However, generally calculations with QCD are notoriously difficult. In particular, the phases of quark matter are poorly understood. Predicted by lattice QCD calculations, the Quark-Gluon Plasma can be created in relativistic heavy ion collisions. This strongly interacting quantum liquid, first discovered at the Relativistic Heavy Ion Collider (RHIC), was found to flow more freely than any other known fluid with charged particle angular correlation analyses. To go beyond the studies of the debris of the QGP, we can study the passage of color charged particles through this fascinating medium. One studies heavy ion collisions which produce not only the QGP but also heavy quarks, energetic gluons and quarks by chance. High energy quarks and gluons lose energy by radiating gluons or by colliding with the other quarks and gluons as they traverse through the QGP, a phenomenon often referred to as “Jet Quenching”. The slow-moving heavy quarks, which are interacting with the QGP strongly, open a window to the study of in-medium color force. In this talk, I will review the most striking observations made in recent data collected by the Compact Muon Solenoid detector at the Large Hadron Collider and the properties of the QGP fluid extracted from these measurements.
Brief Bio

Yen‐Jie Lee completed his undergraduate degree and Master’s in Physics at the National Taiwan University under the supervision of Prof. Min-Zu Wang and his doctoral work at MIT in 2011 under the supervision of Prof. Wit Busza. After postdoctoral work at the Laboratory for Nuclear Science at MIT, he completed a combined CERN and Marie Curie Fellowship at CERN from 2012 to 2013. He joined the MIT Physics faculty in September 2013 and was promoted to Associate Professor of Physics in 2018. Prof. Lee’s research aims to move beyond discovery‐era qualitative measurements of QGP and to understand QCD matter in extreme conditions, such as those that existed in the first microseconds of the universe and that are thought to exist at the core of some neutron stars. He served as one of the Heavy Ion Physics Group co-conveners in the CMS collaboration from 2014 to 2016. He also served as heavy-ion physics executive board representative in the CMS collaboration between 2016 and 2018. Prof. Lee received an Early Career Research Award from the U.S. Department of Energy in 2015, an NEC Corporation Fund Award from the MIT Research Support Committee, a Sloan Research Fellowship from the Alfred P. Sloan Foundation in 2016 and a Class of 1958 Career Development Professorship since 2016.

May 07,2019

Din Ping Tsai , Department of Physics, NTU

Host:  Xiao-Gang He
Time: 2:20 pm -3:20 pm
Place: Room 104, CCMS-New Phys. building
Title:
Meta Optics: Advance and Application
of Meta Lens

Abstract

Metalenses consist of a large number of optical nanoantennas which are capable of focusing the incoming wavefront of light [1-6]. We use a 60 × 60 dielectric achromatic metalens array to capture multidimensional optical information. The highest efficiency can be up to 74% at a wavelength of 420 nm, while the average efficiency is approximately 39% over the whole working bandwidth. The light field images and the depth information of objects can be determined by reorganizing the patches of sub-images and calculating the disparity of neighbor sub-images, respectively. The depth information can be used to optimize the patch sizes to render the all-in-focus images without artifacts. The smallest feature of objects that could be resolved in our system is 1.95 μm under the incoherent white light. Our work provides several advantages associated with light field imaging: elimination of chromatic aberration, polarization selectivity and compatibility of the semiconductor process. Considering the flexibility, the achromatic multiplexed metalens array with integrated functionalities may be promising for multifocusing microscopy, high-dimension quantum technology, hyperspectral microscopy, micro robotic vision, nomen automobile sensing, virtual and augmented reality (VR and AR), drones, and miniature personal security systems [7].
References
S. M. Wang, P. C. Wu, V.-C. Su, Y.-C. Lai, C. H. Chu, J.-W. Chen, S.-H. Lu, J. Chen, B. B. Xu, C.-H. Kuan, T. Li, S. N. Zhu and D. P. Tsai, Nature Comm. 8, 187 (2017).
B. H. Chen, P. C. Wu, V.-C. Su, Y.-C. Lai, C. H. Chu, I. C. Lee, J.-W. Chen, Y. H. Chen,Y.-C. Lan, C.-H. Kuan and D. P. Tsai, Nano Lett. 17, 6345 (2017).
S. M. Wang, P. C. Wu, V.-C. Su, Y.-C. Lai, M.-K. Chen, H. Y. Kuo, B. H. Chen, Y. H. Chen, T.-T. Huang, J.-H. Wang, R.-M. Lin, C.-H. Kuan, T. Li, Z. Wang, S. Zhu and D. P. Tsai, Nature Nanotechnology 13, 227(2018) .
V.-C. Su, C. H. Chu, G. Sun and D. P. Tsai, Optics Express 26, 13148 (2018).
M. L. Tseng, H.‐H. Hsiao, C. H. Chu, M. K. Chen, G. Sun, A.‐Q. Liu and D. P. Tsai, Adv. Optical Mater. 6, 1800554 (2018).
H.‐H. Hsiao, Y. H. Chen, R. J. Lin, P. C. Wu, S. Wang, B. H. Chen and D. P. Tsai, Adv. Optical Mater. 6, 1800031 (2018).
R. J. Lin, V. -C. Su, S. M. Wang, M. K. Chen, T. L. Chung, Y. H. Chen, H. Y. Kuo, J. W. Chen, J. Chen, Y. T. Huang, J.H. Wang, C. H. Chu, P. C. Wu, T. Li, Z. Wang S. Zhu and D. P. Tsai, Nature Nanotechnology, 14(3) 227-231 (2019).


Brief Bio

Professor Din Ping Tsai is a Distinguished Research Fellow of Research Center for Applied Sciences, Academia Sinica and Distinguished Professor of Department of Physics, National Taiwan University. He is a Fellow of AAAS, APS, IEEE, JSAP, OSA, SPIE, Physics Society of Taiwan and Electro Magnetics Academy. He is also the Member of International Academy of Engineering (IAE), and Academician of Asia-Pacific Academy of Materials (APAM). He is the President of Taiwan Information Storage Association (TISA) (2015-). He was the president of Taiwan Photonics Society (TPS) (2014-2016), and served as committee member for IEEE Joseph F. Keithley Award in Instrumentation & Measurement (2013-2016), and the award committee for OSA and IS&T Edwin H. Land Medal (2014-2016). He was the Director of the Board of SPIE from 2012 to 2014, and Chair (2009-2013) of IEEE Instrument and Measurement Society, Taipei Chapter, Member of SPIE Fellow Committee for three years (2010-2013), and Member of OSA Fellows and Honorary Members Committee for 2008 & 2009, respectively. He was the chair and vice chair of the International Society for Optical Engineering (SPIE) Taiwan chapter for the 2004 & 2005 and 1996 & 1997, respectively. He was also a member of technical committee of IEEE/LEOS nanophotonics. He currently serves as an Editor of “Progress in Quantum Electronics (PQE),” Associate Editor of “Journal of Lightwave Technology (JLT),” and member of editorial boards of ten Optics, Photonics and Physics related SCI journals. He served as the Director General of the Instrument Technology Research Center (NARL) located in Hsinchu Science Park, Taiwan from 2008 to 2012, and the Director of Research Center for Applied Sciences, Academia Sinica, Taiwan from 2012 to 2019. He is author and co-author of 302 SCI journal papers (more than 9911 cited times, H-index 50), 65 book chapters and conference papers, and 38 technical reports and articles. He had 44 patents in USA, Japan, Canada, Germany and Taiwan. His current research interests are Near-field Optics, Nano-photonics, Plasmonics, Meta-Optics, Bio-photonics, Green Photonics, Quantum Photonics and their applications.

May 14, 2019

Paul Ho, ASIAA

Host:  Xiao-Gang He
Time: 2:20 pm -3:20 pm
Place: Room 104, CCMS-New Phys. building
Title:
The First Direct Image of a Black Hole

Abstract

The Event Horizon Telescope, a network of 8 radio telescopes, operating at millimeter-wavelengths, and spanning the surface of the earth, has successfully produced the first picture of a black hole. This Supermassive Black Hole, in the nucleus of the M87 galaxy, is the first case where we can resolve the event horizon, where even light itself cannot escape from the gravity of the black hole. This first picture also demonstrates directly Einstein’s General Relativity on the distortion of space in the presence of strong gravity. In addition, we detect the glow of material swirling around the black hole in the form of an accretion disk, where material gather before falling inside the black hole. Taiwan has played a major role in this experiment. More improvement are coming.

Brief Bio

Paul served as postdoctoral fellow at the Five College Radio Astronomy Observatory, and at the Radio Astronomy Laboratory at UC Berkeley. He was faculty member at Harvard University before becoming SMA Project Scientist and Senior Astrophysicist at the Smithsonian Astrophysical Observatory. He has served as ASIAA Director during 10 of the last 17 years in Taiwan. He is currently the Director General of the East Asian Observatory, a newly established joint observatory between China, Japan, Taiwan, and Korea.His scientific interests include molecular spectroscopy for resolving 3D dynamics , molecular outflows as the core process in star and planet formation, magnetic field via dust polarization morphology as the principal process in cloud collapse, supermassive black hole as the definitive probe of high gravitational fields, large surveys of galaxies as a window on early cosmological structures. In his efforts to drive the growth of astronomy in Taiwan, Paul focuses on the development of instrumentation for forefront fields in astronomy. Participation in these projects gained access for Taiwan to frontier research in astronomy, while building the infrastructures in Taiwan in terms of manpower, technology, and industrial partnership. Paul has promoted the participation of Taiwan in the EACOA, which unites the East Asian Observatories to work on regional collaboration and development, in order to make Asia competitive with the western countries.

May 21, 2019



SUGITA ,Seiji, School of Science(U Tokyo)

Host:  Okumura, Teppei
Time: 2:20 pm -3:20 pm
Place: Room 104, CCMS-New Phys. building
Title:
The evolution of asteroid Ryugu and its parent body constrained by Hayabusa2 obsrevations

Abstract

JAXA’s Hayabusa2 spacecraft arrived at asteroid 162173 Ryugu on June 27, 2018 and conducted global observa-tions (~2 m/pix) from 20 km of altitude first and subsequently conducted a number of high-resolution regional and local observations (down to ~1mm/pix) during low-altitude descents including touch-down operation for sampling on Feb. 22, 2019. In this study, we summarize optical imaging observation results obtained from these wide range of spatial resolutions, focusing on the constraints they provide on Ryugu’s parent body.

Brief Bio

Education
1999 Ph.D. Geology Brown University
1992 M.S. Geophysics University of Tokyo
1990 B.S. Geophysics University of Tokyo

Professional Record
2009 – present Professor, University of Tokyo
2004 – 2009 Associate Professor, University of Tokyo
1999 – 2003 Faculty Research Associate, University of Tokyo
1999 – 2000 National Research Council Research Associate, NASA Ames Research Center
1998 – 1999 Postdoctoral Research Associate, Brown University

Relevant Project Experience
• Science Principal Investigator, Hayabusa2: 2011-present
• Co-Investigator, Kaguya RSAT: 2007-2009
• Principal Investigator, Subaru telescope observation of Deep Impact collision with 9/P Tempel 1: 2005
Awards, Achievements, and Professional Services
• JAXA/ISAS Advisory Council for Research and Management member: 2017 – present
• NAOJ Advisory Committee for Research and Management member: 2015 – present
• JAXA/ISAS Science Steering Committee member: 2009-2012

May 28, 2019

Chii-Dong Chen,  ASIP

Host:  Ya-Ping Hsieh
Time: 2:20 pm -3:20 pm
Place: Room 104, CCMS-New Phys. building
Title:
Optoelectromechanical oscillators,
superconducting qubits and microwave
cavities

Abstract

A miniature optoelectromechanical oscillator (MO) is capable of coupling with the electromagnetic field through radiation pressure, where phonon modes are coupled with photon states. A MO can interact with a broad spectrum of photons, making it an excellent transducer to mediate lights with frequencies several orders apart. Specifically, we plan to use MOs as a transducer that can parametrically interact with radio-frequency (RF) photons and optical photons. This transducer would enable optical light teleportation of quantum information embedded in a superconducting qubit processor. In this talk, I will first present our recent progress on probing graphite and NbSe2 MOs using Fabry-Perot interference technique as well as sideband shifts of RF cavities. This will be followed by a description of observed Rabi shift of a transmon qubit coupled to superconducting coplanar waveguide cavities. Finally, I will discuss our plan for a hybrid MO/transmon system in a 3D RF cavity with a Fabry-Perot optical interferometer.

Brief Bio

1987: Master of Engineering, Department of Applied Electronics, Tokyo Institute of  Technology, Japan
Major subject: Detection of Microwave using Josephson Junctions
1994: Doctor of Philosophy, Department of Physics, Chalmers University of  Technology, Sweden
Major subject: Dynamics of Vortices and Charges in Two Dimensional Arrays  of Small Josephson Junctions
~1997: Post-doctoral researcher,NEC fundamental research laboratories, Tsukuba,Japan
~2002: Assistant Research Fellow, Institute of Physics, Academia Sinica
~2007: Associate Research Fellow, Institute of Physics, Academia Sinica
Current position: Research Fellow, Institute of Physics, Academia Sinica Research interest: Nanoelectronics, Superconducting qubits

June 04, 2019

David Shih,  Physics and Astronomy(RU)

Host:  Cheng-Wei Chiang
Time: 2:20 pm -3:20 pm
Place: Room 104, CCMS-New Phys. building
Title:
Deep Learning and the LHC:
A New Era of Collider Physics

Abstract


The AI revolution is transforming our everyday world and it is beginning to have a major impact on the LHC. With its enormous and complex dataset, together with access to detailed and accurate simulations, the LHC is an ideal setting for applications of deep learning. As we move into the high luminosity era of the LHC, deep learning is expected to play a major role in the experiment, from triggering to reconstruction to physics analysis. Large gains in performance and sensitivity are expected, as well as qualitatively new types of analyses. In this talk, I will review the latest developments in this rapidly growing field, which include applications to boosted object tagging, pileup reduction, event generation, and anomaly detection.

Brief Bio

Prof. David Shih received his Ph.D. in Physics in 2006 from Princeton University. He was a postdoctoral fellow at Harvard (2006-2007) and the Institute for Advanced Study (2007-2010) before joining the faculty at the NHETC, Rutgers University in 2010. Prof. Shih was a recipient of a DOE Early Career Award, Sloan Foundation Fellowship and the Macronix Prize. He works extensively on high energy particle physics, focusing especially on the phenomenology of physics beyond the Standard Model.

June 11, 2019

Phiala Shanahan

Department of Physics,MIT

Host:  Jiunn-Wei Chen
Time: 2:20 pm -3:20 pm
Place: Room 104, CCMS-New Phys. building
Title:
Nuclear physics from the Standard Model

Abstract


I will discuss the status and future of numerical lattice Quantum Chromodynamics (QCD) calculations for nuclear physics. With advances in supercomputing, we are beginning to quantitatively understand nuclear structure and interactions directly from the fundamental quark and gluon degrees of freedom of the Standard Model. Recent studies provide insight into the neutrino-nucleus interactions relevant to long-baseline neutrino experiments, double beta decay, and nuclear sigma terms needed for theory predictions of dark matter cross-sections at underground detectors. I will also address new work constraining `exotic glue’ in nuclei, which will be measurable for the first time at a future electron-ion collider, and explain how machine learning tools are providing new possibilities in this field.

Brief Bio

Phiala Shanahan is an Assistant Professor in the Center for Theoretical Physics at the Massachusetts Institute of Technology. Shanahan obtained her PhD from the University of Adelaide, Australia. Before joining the faculty at MIT, she was an Assistant Professor at the College of William & Mary and Senior Staff Scientist at the Thomas Jefferson National Accelerator Facility, and a Postdoctoral Associate at MIT. Prof. Shanahan is the recipient of an NSF CAREER award, was named as an Simons-Emmy Noether fellow, and was listed in the Forbes Magazine 30 under 30 in Science.

June 18, 2019

Yu-tin Huang,  NTU-Phys

Host:  Xiao-Gang He
Time: 2:20 pm -3:20 pm
Place: Room 104, CCMS-New Phys. building
Title:
The positivity (>0) of physics

Abstract

In recent years, by attempting to manifest the physical properties of various observables in quantum field theories, we have seen the emergence of a unifying positive geometry. Instead of geometry of the space time, this new geometry is defined in the space for which the physical observable lives. I will give examples including scattering amplitudes of phi^3 theory, the correlation functions of Ising networks, and the couplings of effective field theory. In each example, the positive geometry IS the reflection of fundamental physical principles of the underlying system. These principle include symmetries, consistency with quantum mechanics, and locality. In the end we will focus on the particular example of black holes, where the cosmic censorship principle is translated to the positivity of the coupling for certain effective operator, for which at the boundary (=0) lies supersymmetric theories

Brief Bio

Yu-tin Huang received his PhD degree in 2009 from YITP at SUNY Stony Brook University. He went on to post doctoral positions at UCLA and University of Michigan, and became a member at Institute of Advance Studies in Princeton in 2013. In 2014 he was appointed assistant professor at NTU. He is one of the leading experts in Scattering amplitudes, and received the 2018 Nishiha Asia award as well as 2018 Ta-You Wu memorial award and is the Golden-Jade fellow of CTP/NTU.