Monday, March 25, 2019, 9:00 am

Hosted by: Sally Dawson

Monday, March 25, 2019, 10:00 am

Hosted by: Oleg Gang

Self-assembly has spurred a great research interest across different disciplines due to the new fundamental questions it raises as well as the potential for material fabrication. On nanoscale, DNA is a powerful tool allowing the assembly of nanoparticles (NPs) with controlled interparticle distance and specific structural organizations. Synchrotron-based X-ray scattering techniques offer invaluable information to understand the structure and dynamics in such self-assembly systems. In this talk, I will highlight three of my studies, namely, multi-component assembly, dynamic structure control, and NP orientational ordering, as well as demonstrate how to utilize coherent X-ray scattering to advance self-assembly science. First, I will show how to assemble diverse functional NPs into heterogeneous superlattices and elucidate how compositional order, probed by small-angle X-ray scattering (SAXS), can be controlled by the design of DNA shells [1]. Second, I will demonstrate the study of reprogramming DNA interactions to selectively transform the structure of NP superlattices on demand. I will detail how the phase transition pathway is disclosed by pair distribution function (PDF) and different types of SAXS correlation techniques based on real-time in-situ measurements [2]. The third topic is focused on developing SAXS modelling and structural visualization, which helps reveal a remarkable parking with a break of orientational symmetry in nanocube superlattices [3]. Additionally, while working at world-leading coherent hard X-ray scattering (CHX) beamline, I have developed advanced and nearly real-time temporal/spatial-correlation techniques [4], which not only highly benefit the user research programs by also open tremendous new research opportunities (grain boundary dynamics, defects/NP diffusion, strain mapping, crack progradation, etc.) in self-assembly science for the future. The developed techniques could also facilitate the in-situ operando explo

Monday, March 25, 2019, 10:00 am

Hosted by: Mike McGuigan

Grover search is a special kind of quantum walk, not directly applicable to searching a physical database. It has been shown that a database of N items laid out in d-spatial dimensions can be searched in time of order sqrt(N) for d > 2. It has likewise been shown that quantum walk search performs optimally on 3+D dimension search with the quadratic speedup preserved while its performance does not preserve the quadratic speedup in the 1D and 2D grid. This talk will focus on spatial search via quantum walk and will cover (1) recent advances in 2D and 1D search using Lackadaisical quantum walks, (2) a quantum circuit that utilizes the quantum approximate optimization algorithm (QAOA), related to quantum walk, to perform Grover search by replacing the diffusion operator with transverse (local) operators and, (3) possible approaches for dealing with classical data using near-term small quantum devices.

Monday, March 25, 2019, 2:30 pm

Hosted by: Alessandro Tricoli

The discovery of the Higgs boson at the Large Hadron Collider in 2012 opened a new sector for exploration in the standard model of particle physics. Recent developments, including the use of deep learning to identify a complex but common decay of the Higgs boson to bottom quarks, have expanded our ability to study the production of Higgs bosons with very large momenta. By studying these Higgs bosons and measuring their momentum spectrum, we may be able to discover new physics at very high energy scales inaccessible directly at the LHC. I will explain these searches and the direction that deep learning is taking in particle physics, especially how it's changing the way we think about the trigger, event reconstruction, and our computing paradigm.

Tuesday, March 26, 2019, 9:00 am

Hosted by: Sally Dawson

Tuesday, March 26, 2019, 3:30 pm

Hosted by: Andrei Nomerotski

The first part of the colloquium will provide an overview of United States government's interest in quantum information science from the National Strategic Overview for Quantum Information Science that established the policy objectives for this administration to the National Quantum Initiative Act that formalizes parts of this strategy for key civilian science agencies. This portion of the talk will conclude with placing the United States strategy in the global context and describe how the United States plans to establish the foundation for the quantum 2.0 economy. The second part of the colloquium will begin with a high-level overview of NIST, of NIST's interest in Quantum Information Science, before talking briefly about some interesting highlights from NIST laboratories. Moving from the highlights, the talk will explore ongoing and future metrological applications followed by some hypothetical conjectures of future technological applications with a focus on how quantum information science and its technology may impact fundamental physics from exploring potential time variation of fundamental constants to future probes of dark matter and gravitational waves.

Wednesday, March 27, 2019, 9:00 am

Hosted by: Sally Dawson

Wednesday, March 27, 2019, 10:00 am

Hosted by: QOL/BERA/Recreation

Come to the Rec Hall Bldg. 317 in the apartment area for coffee & pastry and socializing, and if you have children, they'll play!

Thursday, March 28, 2019, 7:30 am

Hosted by: Bernadette Uzzi

Annual professional development event for K-12 science teachers. 8:30 - 9:40 am - Keynote Address 9:50 - 2:40 pm - Workshops

Thursday, March 28, 2019, 10:00 am

Hosted by: Oleg Gang

Organic semiconductors have been studied extensively in recent decades due to their potential to reduce both the material and production costs of electronic devices. Materials developed for applications such as organic photovoltaics (OPVs), organic light emitting diodes (OLEDs), and organic field effect transistors (OFETs) often have similar chemical structures and functionality, and thus can be expected to share similar structure-property relationships. In this talk, I highlight a series of studies where I use and develop synchrotron X-ray techniques to elucidate the morphology of organic semiconducting materials in order to advance our understanding of how nanostructure impacts performance. In the first half of my talk, I will show how wide angle X-ray scattering (WAXS) can be used to monitor the crystal structure of poly(3-hexylthiophene) (P3HT), in situ, during electrochemical doping. By simultaneously probing crystal structure and electrochemical performance, a clear picture of the electrochemical doping process in P3HT emerges. The results found for this model P3HT system have been shown to be consistent with several other studies of OFET devices, demonstrating the generalized nature of the doping process. The second half of my talk is focused on developing resonant soft X-ray reflectivity (RSoXR) as technique to probe the through-film structure of organic thin films. I begin by demonstrating how resonant-enhanced X-ray contrast can be utilized to detect phase segregation in thin films of small-molecule/polymer semiconductor blends, which enables their remarkable performance in OFET devices. Next, I discuss how polarized soft X-rays can enable the study of molecular orientation in thin films. Finally, using a small-molecule model system, I demonstrate how polarized-RSoXR can be used to depth-profile molecular orientation, even in amorphous single-component films. Although these studies are focused on organic electronic

Thursday, March 28, 2019, 11:00 am

Hosted by: Mike Jensen

Using observations collected at the ARM Eastern North Atlantic (ENA) site, we examine the relationship between the large-scale environment and the properties of low-level clouds that occur in conditions of subsidence. The cloud boundary cloud properties correlate well with the difference in potential temperature between the 800 hPa level and the surface, a measure of the degree of boundary layer instability. Moreover, consistent relationships are found between near-surface stability, surface energy fluxes, and cloud fraction, optical thickness, and top temperature in various regions of strong post-cold frontal activity. To help understand these mechanisms, we use the Weather Research Forecast (WRF) model to explore post-cold frontal clouds with a case study. The modeled cloud properties are sensitive to the interactions between the shallow convection and the boundary layer parameterizations. We will report how this sensitivity is related to boundary layer decoupling, vertical shear in the horizontal winds at cloud top, and drizzle. We also test the robustness of these conclusions by analyzing a perturbed initial conditions ensemble using WRF. A comparison of the perturbed physics and the perturbed initial condition ensembles explores the relative impact of circulation changes and physical processes on low-level cloud in the model.

Friday, March 29, 2019, 12:15 pm

Hosted by: Peter Denton

Friday, March 29, 2019, 2:00 pm

Hosted by: Niklas Mueller

Inclusive particle production at high p_t is successfully described by perturbative QCD using collinear factorization formalism with DGLAP evolution of the parton distribution functions. This formalism breaks down at small Bjorken x (high energy) due to high gluon density (gluon saturation) effects. The Color Glass Condensate (CGC) formalism is an effective action approach to particle production at small Bjorken x (low p_t) which includes gluon saturation. The CGC formalism nevertheless breaks down at intermediate/large Bjorken x, corresponding to the high p_t kinematic region in high energy collisions. Here we describe the first steps taken towards the derivation of a new formalism, with the ultimate goal of having a unified formalism for particle production at both low and high p_t in high energy hadronic/heavy ion collisions.

Wednesday, April 3, 2019, 2:30 pm

Hosted by: Aaron Meyer

Wednesday, April 3, 2019, 3:00 pm

Hosted by: Salvatore Fazio

Much attention has been devoted in recent years to the three-dimensional quark and gluon structure of the nucleon. In particular the concept of Generalized Parton Distributions promises an understanding of the generation of the charge, spin, and energy-momentum structure of the nucleon by its fundamental constituents. Forthcoming measurements with unprecedented accuracy at Jefferson Lab and at a future electron-ion collider will presumably challenge our quantitative description of the three-dimensional structure of hadrons. To fully exploit these future experimental data, new tools and models are currently being developed. After a brief reminder of what make Generalized Parton Distributions a unique tool to understand the nucleon structure, we will discuss the constraints provided by the existing measurements and review recent theoretical developments. We will explain why these developments naturally fit in a versatile software framework, named PARTONS, dedicated to the phenomenology and theory of GPDs.

Thursday, April 4, 2019, 11:00 am

Hosted by: Mike Jensen

Knowledge of the adjustment time of anthropogenic CO2, the e-folding time by which excess CO2 (above preindustrial) would decrease in the absence of anthropogenic emissions, is central to understanding the influence of anthropogenic CO2 on climate change and to prospective control of CO2 emissions to reach desired targets. Estimates of this adjustment time from current carbon-cycle models range from about 100 years to over 700 years. This talk examines the CO2 budget by a top-down, observationally based approach. Major stocks and fluxes are quantified. The net flux from the atmosphere and the ocean mixed layer, which are in near equilibrium, to the deep ocean and terrestrial biosphere is found to be proportional to the excess CO2 in these compartments throughout the Anthropocene. These observations, together with knowledge of the underlying physical and chemical processes, are used to develop a simple, transparent model that describes the transport of CO2 between major compartments — the atmosphere, the mixed-layer ocean, the deep ocean, and the terrestrial biosphere. This model compares well with observed atmospheric CO2 from 1750 to the present. The adjustment time of excess CO2, evaluated by multiple measures including the 1/e decay time and the negative inverse of the fractional annual transfer rate of excess CO2 into the terrestrial biosphere and the deep ocean, is found to be 54 ± 10 years. Such a short adjustment time, if correct, would mean that the atmospheric amount of CO2 would respond quickly and strongly to emission changes. For example, atmospheric CO2 could be immediately stabilized at its present value by decreasing anthropogenic emissions by about 50%.

Thursday, April 4, 2019, 1:30 pm

Hosted by: Robert Konik

TBD

Friday, April 5, 2019, 2:00 pm

Hosted by: Niklas Mueller

Sunday, April 7, 2019, 9:30 am

Hosted by: QOL/BERA/Recreation

Join QOL/BERA/Recreation on April 7, 2019 from 9:30am-12:00pm @ The Rec. Hall - Bldg. 317. Egg hunt begins at 11:15am. Special appearance by THE EASTER BUNNY. Bagels and beverages included. Please bring a breakfast treat to share. Sign up with the BERA store is preferred. ex. 3347.

Tuesday, April 9, 2019, 11:00 am

Hosted by: Berndt Mueller

In this talk I will explain (a) what observations speak for the hypothesis of dark matter, (b) what observations speak for the hypothesis of modified gravity, and (c) why it is a mistake to insist that either hypothesis on its own must explain all the available data. The right explanation, I will argue, is instead a suitable combination of dark matter and modified gravity, which can be realized by the idea that dark matter has a super fluid phase.

Tuesday, April 9, 2019, 3:30 pm

Hosted by: Berndt Mueller

I will talk about the results of a citation analysis on publication data from the arXiv and inspire in which we explored gender differences. I will further explain how we can use bibliometric analysis to improve the efficiency of knowledge discovery.

Tuesday, April 9, 2019, 5:00 pm

Hosted by: Vivian Stojanoff

To develop fundamentally new laws of nature, theoretical physicists often rely on arguments from beauty. Simplicity and naturalness in particular have been strongly influential guides in the foundations of physics ever since the development of the standard model of particle physics. In this lecture I argue that arguments from beauty have led the field into a dead end and discuss what can be done about it.

Wednesday, April 10, 2019, 4:00 pm

Hosted by: Alessandro Tricolli

Hidden sector or dark sector states appear in many extensions to the Standard Model, to provide a particle candidate for dark matter in universe or to explain astrophysical observations such the as positron excess observed in the cosmic radiation flux. A hidden or dark sector can be introduced with an additional U(1)d dark gauge symmetry. The discovery of the Higgs boson during Run 1 of the Large Hadron Collider opens a new and rich experimental program based on the Higgs Portal. This discovery route uses couplings to the dark sector at the Higgs level, which were not experimentally accessible before. These searches use the possible exotic decays: H -> Z Zd -> 4l and H -> Zd Zd -> 4l. Here Zd is a dark vector boson. We have experience of this search from the Run 1 period of the LHC using the ATLAS detector at CERN. These results showed (tantalizingly) two signal events where none were expected, so that in the strict criteria of High Energy Physics, the result was not yet statistically significant. The Run 1 analysis for 8 TeV collision energy is further developed in Run 2 with 13 TeV collision energy, to expand the search area, take advantage of higher statistics, a higher Higgs production cross section, and substantially better performance of the ATLAS detector. The analysis is extended to search for heavier scalars decaying to dark vector bosons.

Thursday, April 11, 2019, 11:00 am

Hosted by: Damao Zhang

Thursday, April 11, 2019, 1:30 pm

Hosted by: Qiang Li

A complete study of the structure and thermoelectric properties of colusite Cu26T2(Ge,Sn)6S32 (T = V, Cr, Mo, W) is presented. A brief introduction provides a state-of-theart/survey of thermoelectric sulfides, with a special focus on the structural features and transport properties relationship in Cu-based sulfides. In the first part of this presentation, we highlight the key role of the densification process on the formation of short-to-medium range structural defects in Cu26V2Sn6S32 [1]. A simple and powerful way to adjust carrier concentration combined with enhanced phonon scattering through point defects and disordered regions is described. By combining experiments with band structure and phonons calculations, we elucidate, for the first time, the underlying mechanisms at the origin of the intrinsically low thermal conductivity in colusite samples as well as the effect of S vacancies and antisite defects on the carrier concentration. In the second part, we demonstrate the spectacular role of the substitution of V5+ by hexavalent T6+ cations (Cr, Mo and W) on the electronic properties, leading to high power factors [2]. In particular, Cu26Cr2Ge6S32 shows a value of 1.53 mW m-1 K-2 at RT that reaches a maximum value of 1.94 mW m-1 K-2 at 700 K. The rationale is based on the concept of conductive "Cu-S" network, which in colusites corresponds to the more symmetric parent sphalerite structure. The interactions within the mixed octahedral-tetrahedral [TS4]Cu6 complexes are shown to be responsible for the outstanding electronic transport properties. [1] C. Bourgès et al., J. Amer. Chem. Soc. 140 (2018) 2186 [2] V. Pavan Kumar et al., Adv. Energy Mater. 9 (2019) 1803249

Thursday, April 11, 2019, 4:00 pm

Hosted by: John Hill

Scientists have advocated for the return of samples from Mars for decades. The quest has finally begun in earnest: the Jet Propulsion Laboratory is in the final stages of construction of the Mars 2020 mission. Mars 2020 builds on the highly successful design of the Mars Science Laboratory (Curiosity Rover) and is updated with new landing capabilities, scientific instruments, and a very sophisticated rock sample collection system. Mars 2020's chief goals are to unravel the geology of its landing site, seek evidence of potential Martian biosignatures, and prepare a cache of several dozen samples for possible return to Earth by a future element of a notional Mars Sample Return campaign. NASA recently selected the mission's destination: Jezero Crater. This crater once held a very deep lake comparable in size to Lake Tahoe. Key geologic targets at the site include ancient Martian bedrock, lake sediments and especially a remarkably preserved river delta, and unusual carbonate-bearing rocks possibly precipitated from lake-water. Mars 2020 will launch in the summer of 2020, land on February 18, 2021, and rove the surface for at least two years. I am Project Scientist for Mars 2020 and will describe the goals and development of this mission, and of Mars sample return.

Thursday, April 11, 2019, 6:30 pm

Hosted by: Nora Sundin

Friday, April 12, 2019, 3:30 pm

Wednesday, April 17, 2019, 8:00 am

Thursday, April 18, 2019, 8:00 am

Thursday, April 18, 2019, 11:00 am

Hosted by: Mike Jensen

Friday, April 19, 2019, 8:00 am

Friday, April 19, 2019, 2:00 pm

Hosted by: Niklas Mueller

Wednesday, April 24, 2019, 2:30 pm

Hosted by: Gopolang Mohlabeng

Thursday, April 25, 2019, 11:00 am

Thursday, April 25, 2019, 12:00 pm

Hosted by: Yuta Kikuchi

Thursday, April 25, 2019, 3:00 pm

Hosted by: Alessandro Tricoli

Since the discovery of the Higgs boson in 2012, the particle physics community at the Large Hadron Collider (LHC) has been hard at work studying its properties, and comparing them to the predictions of the Standard Model (SM), including the couplings of the Higgs boson to itself and to other particles. The Higgs self-coupling can be measured directly in the Higgs pair production process, and will provide insight into the nature of electroweak symmetry breaking. In the SM, the di-Higgs cross section in proton-proton collisions is very small. However, a wide range of beyond-the-SM models predict enhancements to the di-Higgs production rate, which motivates searching for di-Higgs production even now, when the SM cross section is too small to measure in the current LHC dataset. Looking forward, the LHC Run 3 and HL-LHC will bring a new set of challenges, including more proton-proton collisions per bunch crossing. Extracting rare physics signatures from this busier environment will be difficult for the current ATLAS trigger system. In this talk, I will present current and future ATLAS searches for hh production using a variety of final states, and discuss the use of future track triggers in upgrades to the ATLAS trigger system.

Friday, April 26, 2019, 4:00 pm

Hosted by: Donald DiMarzio

In this talk, I discuss our recent research activity in electromagnetics, nano-optics, quantum optics, acoustics and mechanics, showing how suitably tailored meta-atoms and suitable arrangements of them open exciting venues to realize non-reciprocal devices for light, radio-waves and sound, largely breaking Lorentz reciprocity and realize isolation without the need of magnetic bias. Our approaches are based on using suitably tailored mechanical motion, spatio-temporal modulation, and large nonlinearities in coupled resonator systems, and have enabled magnetic-free circulators and isolators for sound, microwaves, THz and optical frequencies, non-reciprocal antennas, emitters and absorbers breaking Kirchhoff's law, self-induced isolation for high-intensities triggered by nonlinearities, and a new generation of topological insulators for light, sound, and static systems in mechanics. In the talk, I will also discuss the impact of these concepts from basic science to practical technology from classical light to quantum optics and computing. Andrea Alù is the Founding Director and Einstein Professor at the Photonics Initiative, CUNY Advanced Science Research Center. He received his Laurea (2001) and PhD (2007) from the University of Roma Tre, Italy, and, after a postdoc at the University of Pennsylvania, he joined the faculty of the University of Texas at Austin in 2009, where he was the Temple Foundation Endowed Professor until Jan. 2018. Dr. Alù is a Fellow of IEEE, OSA, SPIE and APS, and has received several scientific awards, including the ICO Prize in Optics (2016), the NSF Alan T. Waterman award (2015), the OSA Adolph Lomb Medal (2013), and the URSI Issac Koga Gold Medal (2011).

Wednesday, May 1, 2019, 2:30 pm

Hosted by: Sally Dawson

Thursday, May 2, 2019, 11:00 am

Thursday, May 2, 2019, 3:00 pm

Hosted by: Chi-Ting Chiang

Thursday, May 2, 2019, 4:00 pm

Hosted by: Andrey Tarasov

Saturday, May 4, 2019, 9:00 am

Hosted by: Amanda Horn

Thursday, May 9, 2019, 11:00 am

Hosted by: Angie Burnett

(pending)

Thursday, May 9, 2019, 6:30 pm

Hosted by: Nora Sundin

Friday, May 10, 2019, 12:15 pm

Hosted by: Gopolang Mohlabeng

Wednesday, May 15, 2019, 2:30 pm

Hosted by: Gopolang Mohlabeng

Thursday, May 16, 2019, 11:00 am

Thursday, May 23, 2019, 11:00 am

Hosted by: Mike Jensen

Thursday, May 30, 2019, 11:00 am

Thursday, May 30, 2019, 6:00 pm

Hosted by: Dr. Mel Morris

Monday, June 3, 2019, 8:00 am

Hosted by: Noel Blackburn

Thursday, June 6, 2019, 4:00 pm

Hosted by: Chang-Yong Nam

Wednesday, June 12, 2019, 9:00 am

Hosted by: Long Island Blood Services

Thursday, June 13, 2019, 9:00 am

Hosted by: Long Island Blood Services

Thursday, June 13, 2019, 6:30 pm

Hosted by: Nora Sundin

Wednesday, June 19, 2019, 2:30 pm

Hosted by: Gopolang Mohlabeng

Saturday, June 22, 2019, 11:00 am

Hosted by: Marc Montemagno

This event is open to everyone who wishes to experience Ham Radio. We will have at least 3 transceiver stations setup for the purpose of contacting other stations throughout the US and the world.

Monday, July 8, 2019, 9:00 am

Hosted by: Dr. Aleida Perez

Monday, July 8, 2019, 9:00 am

Hosted by: Dr. Aleida Perez

Tuesday, August 20, 2019, 4:00 pm

Hosted by: Christie Nelson

Monday, August 26, 2019, 8:30 am

Hosted by: Noel Blackburn

Thursday, September 5, 2019, 9:00 am

Hosted by: Long Island Blood Services

Tuesday, November 5, 2019, 8:30 am

Hosted by: Dr. Aleida Perez