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OCT
17
Thursday
Environmental & Climate Sciences Department Seminar
"What drives precipitation initiation in marine stratocumulus?"
Presented by David Mechem, University of Kansas
11 am, Large Conference Room, Bldg. 490
Thursday, October 17, 2019, 11:00 am
Hosted by: Mike Jensen
The initial formation of precipitation in warm clouds remains shrouded in mystery. Precipitation initiation in bulk microphysical parameterizations is typically cast as a nonlinear function dependent on liquid water content and droplet concentration, which suggests two possible paths to precipitation initiation in actual clouds—high liquid water content or low droplet concentration. A bin-microphysics large-eddy simulation (LES) model is employed investigate the dominant microphysical precursor conditions influencing precipitation initiation for a case of marine stratocumulus over the eastern North Atlantic. Results suggest that new regions of precipitation are associated with fluid parcels that previously participated in the precipitation process.
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OCT
17
Thursday
RIKEN Lunch Seminar
"Bottomonia in QGP from lattice QCD: Beyond the ground states"
Presented by Rasmus Larsen, BNL
12 pm, Building 510, Room 2-160
Thursday, October 17, 2019, 12:00 pm
Hosted by: Yuta Kikuchi
Using novel lattice (non-relativistic) QCD techniques, for the first time, we will present results pertaining to the fate of Υ(1S), Υ(2S) and Υ(3S) in QGP. We will present results on how the masses of these states change with temperature, as well as how their spatial sizes change. Finally, we will also show new lattice QCD results on excited P-wave bottomonia in QGP.
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OCT
17
Thursday
AAAG/BWIS Speaker
"Realigning the Crooked Room in STEM"
Kimberly Jackson, Spelman College
4 pm, Hamilton Seminar Room, Bldg. 555
Thursday, October 17, 2019, 4:00 pm
Chair and Associate Professor of Chemistry and Biochemistry and director of the Food Studies program at Spelman College in Atlanta, Georgia, Dr. Kimberly Jackson will discuss two aspects of her research program—novel therapeutic agents for hormone refractory prostate cancer and the role of minority-serving institutions and women of color in diversifying the STEM pipeline.
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OCT
18
Friday
NT/RIKEN Seminar
"The bulk viscosity of QCD in the chiral limit"
Presented by Derek Teaney, Stony Brook
2 pm, Building 510, CFNS Room 2-38
Friday, October 18, 2019, 2:00 pm
In the chiral limit, the long distance effective theory of QCD at finite temperature is not hydrodynamics but a kind of non-abelian superfluid hydrodynamics. We describe this theory and its viscous corrections, including also a correction due to the finite quark mass. At finite quark mass, the long distance theory is ordinary hydrodynamics, and the superfluid theory then just determines non-analytic in the quark mass corrections to the transport coefficients of QCD, akin to the "long time tails" of hydro. We show how this works out for the bulk viscosity. In chiral perturbation theory the dissipative parameters of the superfluid theory can be computed diagrammatically, and we do this. These results then determine the leading order the bulk viscosity of the pion gas close to the chiral limit.
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OCT
21
Monday
Center for Functional Nanomaterials Seminar
"Heterogeneous Chemistry at Liquid/Vapor Interfaces Investigated with Photoelectron Spectroscopy"
Presented by Hendrik Bluhm, Fritz Haber Institute of the Max Planck Society, Department of Inorganic Chemistry, Faradayweg, Berlin, Germany
11 am, Bldg.735 (CFN) 1st floor conference room
Monday, October 21, 2019, 11:00 am
Hosted by: Ashley Head
Aqueous solution/vapor interfaces govern important phenomena in the environment and atmosphere, including the uptake and release of trace gases by aerosols and CO2 sequestration by the oceans.[1] A detailed understanding of these processes requires the investigation of liquid/vapor interfaces with chemical sensitivity and interface specificity under ambient conditions, i.e., temperatures above 200 K and water vapour pressures in the millibar to tens of millibar pressure range. This talk will discuss opportunities and challenges for investigations of liquid/vapor interfaces using X-ray photoelectron spectroscopy and describe some recent experiments that have focused on the propensity of certain ions and the role of surfactants at the liquid/vapor interface. [1] O. Björneholm et al., Chem. Rev. 116, 7698 (2016).
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OCT
22
Tuesday
Physics Colloquium
"KATRIN and the Neutrino Mass Scale"
Presented by Diana Parno, Carnegie Mellon University
3:30 pm, Large Seminar Room, Bldg. 510
Tuesday, October 22, 2019, 3:30 pm
Hosted by: Xin Qian
Ever since it was first hypothesized 89 years ago, the strange and ghostly particle called the neutrino has mystified and inspired particle and nuclear physicists. After decades of experimental and theoretical work, we have now firmly established that neutrinos have mass, and yet their absolute mass scale remains unknown. Now, after many years of painstaking design, construction, and commissioning work, the Karlsruhe Tritium Neutrino experiment (KATRIN) has recently improved the world's best direct neutrino-mass sensitivity by a factor of 2, with more improvements to come. I will give a tour of KATRIN's 70-m beamline, share some of our adventures with engineering challenges and novel backgrounds, describe our spectral fits and systematic uncertainties, and show a glimpse of KATRIN's future.
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OCT
23
Wednesday
Center for Functional Nanomaterials Seminar
"Transient catalytic kinetics with Temporal Analysis of Products (TAP): from reaction mechanisms towards comprehensive spectro-kinetic experiments"
Presented by Dr. Evgeniy Redekop, University of Oslo, Norway
2 pm, CFN Bldg. 735 Conf. Rm. A - first floor
Wednesday, October 23, 2019, 2:00 pm
Hosted by: Anibal Boscoboinik
Reactions between gaseous species and solid surfaces are the cornerstone of heterogeneous catalysis and many other areas of materials science. Transient kinetics provides an invaluable source of data for characterizing the reactivity of different materials and unraveling the mechanisms of multistep gas-solid reactions. In this seminar, I will discuss the unique features of the Temporal Analysis of Products (TAP) methodology that enables precise transient kinetic experiments on complex, high surface area materials. Selected case studies will be used to illustrate the main concepts with the emphasis on using TAP to bridge the pressure and materials gaps in catalysis as well as developing transient spectro-kinetic experiments for a more comprehensive catalyst characterization.
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OCT
23
Wednesday
CSI Q Seminar
"Universal logical gate sets with constant-depth circuits for topological and hyperbolic quantum codes"
Presented by Guanyu Zhu, IBM T.J. Watson Research Center
3 pm, Conference Room 201, Bldg 734
Wednesday, October 23, 2019, 3:00 pm
Hosted by: Layla Hormozi
A fundamental question in the theory of quantum computation is to understand the ultimate space-time resource costs for performing a universal set of logical quantum gates to arbitrary precision. To date, common approaches for implementing a universal logical gate set, such as schemes utilizing magic state distillation, require a substantial space-time overhead. In this work, we show that braids and Dehn twists, which generate the mapping class group of a generic high genus surface and correspond to logical gates on encoded qubits in arbitrary topological codes, can be performed through a constant depth circuit acting on the physical qubits. In particular, the circuit depth is independent of code distance d and system size. The constant depth circuit is composed of a local quantum circuit, which implements a local geometry deformation, and a permutation of qubits. When applied to anyon braiding or Dehn twists in the Fibonacci Turaev-Viro code based on the Levin-Wen model, our results demonstrate that a universal logical gate set can be implemented on encoded qubits in O(1) time through a constant depth unitary quantum circuit, and without increasing the asymptotic scaling of the space overhead. Our results for Dehn twists can be extended to the context of hyperbolic Turaev-Viro codes as well, which have constant space overhead (constant rate encoding). This implies the possibility of achieving a space-time overhead of O(d/log d), which is optimal to date. From a conceptual perspective, our results reveal a deep connection between the geometry of quantum many-body states and the complexity of quantum circuits. References: arXiv:1806.06078,arXiv:1806.02358, Quantum 3, 180 (2019) (arXiv:1901.11029).
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OCT
28
Monday
Chemistry Department Colloquium
"Electronic Cooperativity in Supported Single and Multinuclear-Sites for Catalytic C-C and C-H Bond Functionalization"
Presented by Dr. Massimiliano Delferro, Argonne National Laboratory
11 am, Hamilton Seminar Room, Bldg. 555
Monday, October 28, 2019, 11:00 am
Hosted by: Sanjaya Senanayake
Systematic study of the interactions between organometallic catalysts and metal oxide support materials is essential for the realization of rational design in heterogeneous catalysis. In this talk, I will describe the stoichiometric and catalytic chemistry of a series of organometallic complex chemisorbed on a variety of metal oxides as a multifaceted probe for stereoelectronic communication between the support and organometallic center. Electrophilic bond activation was explored in the context of stoichiometric hydrogenolysis as well as catalytic hydrogenation, dehydrogenation, and H/D exchange. Strongly acidic modified metal oxides such as sulfated zirconia engender high levels of activity toward electrophilic bond activation of both sp2 and sp3 C–H bonds, including the rapid activation of methane at room temperature; however, the global trend for the supports studied here does not suggest a direct correlation between activity and surface Brønsted acidity, and more complex metal surface interactions are at play.
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OCT
28
Monday
Mindfulness Meditation ~ QOL/BERA/Recreation
"Mindfulness Meditation ~ QOL/BERA/Recreation"
12 pm, Large Conference Room, Bldg. 490
Monday, October 28, 2019, 12:00 pm
Hosted by: QOL/BERA/Recreation
Free, open for as long as you're able to stay to learn techniques to quiet the mind, relax, and manage stress.
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OCT
30
Wednesday
hospitality coffee & play group ~ Halloween Party!
"Hospitality Coffee & Play Group~ Halloween Party!"
10 am, Recreation Hall, Bldg. 317
Wednesday, October 30, 2019, 10:00 am
Hosted by: QOL/BERA/Recreation
Come and enjoy a Halloween Party! Your little one can dress in costume if you would like to! All are welcome to Hospitality Coffee & Play Group. Socialize, enjoy coffee & pastry, and if you have children, they'll play.
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OCT
30
Wednesday
CSI Q Seminar
"Characterizing readout in quantum computers: does the reading '0' really mean 0 and '1' really 1?"
Presented by Tzu-Chieh Wei, Stony Brook University
3 pm, Training Room, Bldg 725
Wednesday, October 30, 2019, 3:00 pm
Hosted by: Layla Hormozi
Typical quantum computation includes three stages: state initialization, gate operations and readout. There are tomographic tools on quantum state and process tomography, as well as one that is often ignored, i.e. the detector tomography. It is important to characterize the readout in interpreting experiments on quantum computers. We use quantum detector tomography to characterize the qubit readout in terms of measurement POVMs on IBM Quantum Computers (e.g. IBM Q 5 Tenerife and IBM Q 5 Yorktown). Our results suggest that the characterized detector model deviates from the ideal projectors, ranging from 10 to 40 percent. This is mostly dominated by classical errors, evident from the shrinkage of arrows in the corresponding Bloch-vector representations. There are also small deviations that are not `classical', of order 3 percent or less, represented by the tilt of the arrows from the z axis. Further improvement on this characterization can be made by adopting two- or more-qubit detector models instead of independent single-qubit detectors for all the qubits in one device. We also find evidence indicating correlations in the detector behavior, i.e. the detector characterization is slightly altered (to a few percent) when other qubits and their detectors are in operation. Such peculiar behavior is consistent with characterization from the more sophisticated approach of the gate set tomography. Finally, we also discuss how the characterized detectors' POVM, despite deviation from the ideal projectors, can be used to estimate the ideal detection distribution.
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NOV
5
Tuesday
Physics Colloquium
"Changing Flavor: the Universe's Weirdest Particle"
Presented by Kirsty Duffy - Leona Woods Award Winner, FNAL
3:30 pm, Large Seminar Room, Bldg. 510
Tuesday, November 5, 2019, 3:30 pm
Neutrinos are some of the most abundant–but elusive–constituents of matter in the universe. It has been firmly established that neutrinos can change flavor (or "oscillate"), as recognized by the 2015 Nobel Prize, and in recent years the field has moved beyond the "discovery" phase to focus on precise measurements of the parameters that determine neutrino oscillation. As our understanding improves, it opens doors to new discoveries about the nature of this little-understood particle. This is a very exciting time in neutrino physics there exists a wealth of fascinating questions to investigate, including recent tantalizing hints of large neutrino-sector CP violation, and we are rapidly developing the tools to answer them. As the United States HEP community leads the next generation of neutrino oscillation experiments, I will give an overview of the field: from the initial discovery of the neutrino, to the first evidence for oscillation, to the most recent results from current long-baseline oscillation experiments such as T2K and NOvA. I will finish by discussing the exciting future prospect of the Deep Underground Neutrino Experiment and the liquid argon time projection chamber technology that makes it possible, including recent results and examples from my own work on MicroBooNE, a liquid argon neutrino detector currently taking data at Fermilab
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NOV
7
Thursday
Environmental & Climate Sciences Department Seminar
"The 2017 Land-Atmosphere Feedback Experiment (LAFE) at the ARM Southern Great Plains (SGP) Site"
Presented by Dave Turner, NOAA
11 am, John Dunn Seminar Room, Bldg. 463
Thursday, November 7, 2019, 11:00 am
Hosted by: Allison McComiskey
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NOV
7
Thursday
Particle Physics Seminar
"Latest neutrino cross-section results from MicroBooNE"
Presented by Dr. Kirsty Duffy, FNAL
3 pm, Small Seminar Room, Bldg. 510
Thursday, November 7, 2019, 3:00 pm
Hosted by: Xin Qian
MicroBooNE, the Micro Booster Neutrino Experiment at Fermilab, is an 85-ton active mass liquid argon time projection chamber (LArTPC) located in the Booster Neutrino Beam at Fermilab. The LArTPC technology with 3mm wire spacing enables high-precision imaging of neutrino interactions, which leads to high-efficiency, low-threshold measurements with full angular coverage. As the largest liquid argon detector worldwide taking neutrino beam data, MicroBooNE provides a unique opportunity to investigate neutrino interactions in neutrino-argon scattering at O(1 GeV) energies. These measurements are of broad interest to neutrino physicists because of their application to Fermilab Short Baseline Neutrino program and the Deep Underground Neutrino Experiment (which will both rely on LArTPC technology), as well as the possibility for new insights into A-dependent effects in neutrino scattering on heavier targets such as argon. In this seminar I will present the most recent cross-section results from MicroBooNE, including measurements of inclusive charged-current neutrino scattering, neutral pion production, and low-energy protons. Many of the results I will show represent the first measurements of these interactions on argon nuclei, as well as an exciting demonstration of the potential of LArTPC detector technology to improve our current understanding of neutrino scattering physics.
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NOV
13
Wednesday
CSI Q Seminar
"Quantum Information: History, Development and Applications"
Presented by Vladimir Korepin, Stony Brook University
3 pm, Training Room, Bldg 725
Wednesday, November 13, 2019, 3:00 pm
Hosted by: Layla Hormozi
History and information theory will be briefly mentioned. Entanglement in spin chains and applications will be reviewed. Algorithms will be mentioned (specifically quantum search).
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NOV
21
Thursday
Particle Physics Seminar
Presented by Stefano Zambito, Harvard University
3 pm, Small Seminar Room, Bldg. 510
Thursday, November 21, 2019, 3:00 pm
Hosted by: Viviana Cavaliere
"After the discovery of the Higgs Boson, the predictions of the Standard Model of particle physics can be extrapolated without inconsistencies all the way up to the Planck mass. Despite this tremendous success, we still remain in the dark about many open puzzles. Why is the weak interaction much stronger than gravity? What is the nature of Dark Matter? Are the strong, weak and electromagnetic forces a lower-energy manifestation of one single fundamental interaction? A possible solution to these questions is provided by Supersymmetry. The key assumption behind many natural supersymmetric models is that the masses of the gluinos, the top squarks and the higgsinos are near the TeV scale, thus within the LHC reach. In this presentation, I will introduce some of the theoretical and phenomenological arguments that motivate the quest for Supersymmetry. I will then outline how I searched for the above-mentioned particles using LHC Run-2 data collected by the ATLAS experiment. Finally, I will focus on my vision of the future and my research plans in high-energy experimental physics."
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DEC
18
Wednesday
CSI Q Seminar
"Probing quantum entanglement at the Electron Ion Collider"
Presented by Dmitri Kharzeev, Stony Brook University and BNL
3 pm, Training Room, Bldg 725
Wednesday, December 18, 2019, 3:00 pm
Hosted by: Layla Hormozi
The structure functions measured in deep-inelastic scattering are related to the entropy of entanglement between the region probed by the virtual photon and the rest of the hadron. This opens new possibilities for experimental and theoretical studies using the Electron Ion Collider. The real-time evolution of the final state in deep-inelastic scattering can be addressed with quantum simulations using the duality between high energy QCD and the Heisenberg spin chain.
