The passing of UConn Physics Professor Emeritus, Arnold Russek
Arnold Russek, a theoretical atomic physicist, born July 13, 1926, in New York, passed away on October 13th, 2020, in Colorado. As a young man of 18, he served honorably as a radio engineer in the Pacific during WWII. He earned his Ph.D. at the Courant Institute at New York University in 1953, and taught […]
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AAS Author Interview with Gloria Fonseca Alvarez
UConn graduate student Gloria Fonseca Alvarez was featured with a video in the Author Interview series produced by the American Astronomical Society (AAS). In this video, Gloria talks about her work to understand the inner environments of black holes. The paper highlighted in the video shows that the orbits of emission-line gas around supermassive black holes are often smaller than expected from previous observations.
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Stretching Makes Superconductor
Most superconductors only work when they’re super cold. Chemists and metallurgists have experimented with different combinations of elements for years, trying to get superconductors that work at temperatures close to room temperature. Sochnikov and his students are thinking about it differently. What if mechanical changes such as squeezing or stretching could make a material a superconductor?
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Longtime Science Pioneer Passes Away
Throughout her long life, Cynthia Peterson educated and enriched her family, her students, and her community through science, discovery, and a lifelong enthusiasm for teaching prospective scientists. Through community outreach and during her many years as a professor, Cynthia taught many that wonderment can be found simply by looking up at the night sky.
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My Long-time Friend and Colleague, Prof. Cynthia W. Peterson
When I arrived in Storrs from New York City in 1969 to teach physics at the University of Connecticut, one of the first colleagues I met was Dr. Cynthia Peterson. She had an infectious enthusiasm that appealed to me and my wife Anne. It turned out that Anne and Cynthia had both been students at […]
[Read More]Recent Events
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Prof. Erin Scanlon, Department of Physics, University of Connecticut, "An Introduction to Physics Education Research", Graduate Student Seminar12:15pm
10/16
Prof. Erin Scanlon, Department of Physics, University of Connecticut, "An Introduction to Physics Education Research", Graduate Student Seminar
Friday, October 16th, 2020
12:15 PM - 01:15 PM
Storrs Campus online
Prof. Erin Scanlon,
Department of Physics,
University of Connecticut
An Introduction to Physics Education Research
Physics education research (PER) is a subfield of physics that focuses on investigating questions such as: 1) how can we teach physics better?; 2) how do students learn physics?; and 3) how can we make the physics community more inclusive, equitable, and diverse? In this talk, we will give an introduction to PER, including common misconceptions, methods, and the PER happening at UConn. -
Dr. Viktor Mokeev, Jefferson National Laboratory, "Advances in the Exploration of the Nucleon Resonance Spectrum and Structure in Experimentswith CLAS and CLAS12", Particle, Astrophysics, And Nuclear Physics Seminar2:00pm
10/12
Dr. Viktor Mokeev, Jefferson National Laboratory, "Advances in the Exploration of the Nucleon Resonance Spectrum and Structure in Experimentswith CLAS and CLAS12", Particle, Astrophysics, And Nuclear Physics Seminar
Monday, October 12th, 2020
02:00 PM - 03:00 PM
Storrs Campus online
Dr. Viktor Mokeev, Jefferson National Laboratory
Advances in the Exploration of the Nucleon Resonance Spectrum and Structure in Experimentswith CLAS and CLAS12
Studies of nucleon resonances (N*) in experiments with electromagnetic probes offer unique information on many facets of the strong interaction in the regime of large (on the order of unity) QCD running couplings seen in the generation of the spectrum of N* states with different quantum numbers and structural features. The current status of the N* spectrum and structure studies for exclusive meson photo- and electro-production data with CLAS at Jefferson Lab will be presented in the talk. The extension of these efforts in the Jefferson Lab 12 GeV-era experiments with CLAS12 will be outlined.
WebEx Meeting: https://uconn-cmr.webex.com/uconn-cmr/j.php?MTID=mb3e4c57467ee718677987ca3a427a21d -
Dr. James Guillochon, Berkshire Gray, "From Black Holes, to Data Science, to Robots: Tips & tricks for going into industry", Physics Colloquium: From Black Holes To Robots3:30pm
10/9
Dr. James Guillochon, Berkshire Gray, "From Black Holes, to Data Science, to Robots: Tips & tricks for going into industry", Physics Colloquium: From Black Holes To Robots
Friday, October 9th, 2020
03:30 PM - 04:30 PM
Storrs Campus BPB-131
Dr. James Guillochon, Berkshire Gray
From Black Holes, to Data Science, to Robots: Tips & tricks for going into industry
The majority of physics/astronomy PhD recipients now leave the field for industry either immediately after graduation or after one or more postdoctoral stints. This has been driven by several factors, including the overproduction of PhDs relative to a declining pool of available tenure-track positions, greater freedom to choose where to live, and often significantly higher salaries. However, STEM graduates are increasingly finding that data science, the de facto refuge for former academics, is itself becoming somewhat saturated, with data on recent job listings suggesting that the majority of DS positions are now filled by bachelor's degree recipients rather than PhDs. In this talk, I will describe how I navigated this increasingly complicated landscape to find my current job, and share some pieces of advice I feel are generically useful to those who might be looking for jobs outside of academia in the next few years.
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Dr. James Guillochon received a PhD in astrophysics from the University of California Santa Cruz and then went on to hold prestigious postdoctoral fellowships, the Hubble and ITC fellowships, at the Harvard-Smithsonian Center for Astrophysics. He developed a reputation as a world-renowned researcher in a range of topics, including black hole mergers, tidal disruption events, white dwarf accretion, and more. He is also well-known for his open-source contributions to the scientific community, including vox charta, open access astronomy catalogs, software, as well as maintaining a current list of US and Canadian astrophysics graduate program policies regarding the use of the physics GRE in graduate admissions decisions here.
In 2018 Dr. Guillochon transitioned to working in the industry as a Robotics Engineer in the Boston area. He is an outspoken advocate for positive transitions from academia to industry and will be joining us for a virtual colloquium on Friday to discuss his transition. -
Dr. Hossein Sadeghpour, Institute for Theoretical Atomic, Molecular and Optical Physics, Harvard-Smithsonian Center for Astrophysics, "Quantum electron scattering", Graduate Student Seminar12:15pm
10/9
Dr. Hossein Sadeghpour, Institute for Theoretical Atomic, Molecular and Optical Physics, Harvard-Smithsonian Center for Astrophysics, "Quantum electron scattering", Graduate Student Seminar
Friday, October 9th, 2020
12:15 PM - 01:15 PM
Storrs Campus online
Dr. Hossein Sadeghpour,
Institute for Theoretical Atomic, Molecular and Optical Physics, Harvard-Smithsonian Center for Astrophysics
Quantum electron scattering
The second quantum revolution is upon us and atomic molecular and optical (AMO) physics is the discipline leading this revolution. Major advances in cooling and trapping of atoms and molecules in the last three decades now allow practitioners to create exotic many-body systems whose properties and behavior are predicated on fluctuations inherent in quantum systems. The ultracold AMO systems can be precisely and exquisitely interrogated and manipulated to engineer few-body interactions that "nature" may not naturally provide. I'll draw on some fundamental physics concepts to elucidate a few of these quantum many-body features. -
Dr. Semeon Valgushev, Brookhaven National Lab, "Phase diagram of QCD and Lifshitz regime: how transverse thermal fluctuations might turn nuclear matter into quantum-spin liquid", Particle, Astrophysics, And Nuclear Physics Seminar2:00pm
10/5
Dr. Semeon Valgushev, Brookhaven National Lab, "Phase diagram of QCD and Lifshitz regime: how transverse thermal fluctuations might turn nuclear matter into quantum-spin liquid", Particle, Astrophysics, And Nuclear Physics Seminar
Monday, October 5th, 2020
02:00 PM - 03:00 PM
Storrs Campus online
Dr. Semeon Valgushev, Brookhaven National Lab
Phase diagram of QCD and Lifshitz regime: how transverse thermal fluctuations might turn nuclear matter into quantum-spin liquid
We discuss dense cool QCD where a region with spatially inhomogeneous condensate might emerge. In that case, QCD phase diagram may exhibit a Lifshitz regime, which can appear either instead of, or in addition to Critical End Point. We study the Lifshitz regime using a combination of large-N expansion and numerical lattice simulations of an effective O(N) sigma model. We find evidence that quantum fluctuations disorder inhomogeneous condensate ("chiral spirals") and give rise to unusual quantum spin-liquid phase. We also discuss how this novel phase can be detected experimentally.
Zoom Meeting Link:
https://us02web.zoom.us/j/8192648596?pwd=WFkzK1VXa2V4ZVRVNC90ZnM3NDdlQT09
Meeting ID: 819 264 8596
Passcode: 9lYjMG
Note: The seminar will start at 2:00PM, but participants are welcomed to join the meeting at 1:30PM for discussion. -
Prof. M. Gai, Department of Physics, University of Connecticut, "Oxygen Formation in Stellar Helium Burning", Graduate Student Seminar12:15pm
10/2
Prof. M. Gai, Department of Physics, University of Connecticut, "Oxygen Formation in Stellar Helium Burning", Graduate Student Seminar
Friday, October 2nd, 2020
12:15 PM - 01:15 PM
Storrs Campus online
Prof. M. Gai, Department of Physics, University of Connecticut
Oxygen Formation in Stellar Helium Burning
The Laboratory for Nuclear Science (LNS) at Avery Point (http://astro.uconn.edu), aka the Laboratory for Astrophysics, is engaged in research of several problems central to stellar Evolution theory. Today we shall discuss oxygen formation is stellar helium burning, that determines the C/O ratio in stars. This is an essential laboratory input to stellar evolution theory that for example determines the final fate of a Type II supernova (black hole or neutron star), as well as the light curve of a Type Ia supernova (that is used to measure distances to the end of the observable universe from which the accelerated expansion of the universe was recently discovered).
This presentation will involve our faculty at Avery Point (Gai) and in the UK (Smith) and the two graduate students (Stern and Schweitzer) who are working on experiments at Duke University in the USA, in Warsaw, Poland, and in a new facility constructed in Romania. -
Prof. Richard Milner MIT, Physics Colloquium: Visualizing The Proton3:30pm
9/25
Prof. Richard Milner MIT, Physics Colloquium: Visualizing The Proton
Friday, September 25th, 2020
03:30 PM - 04:30 PM
Storrs Campus Remote
Prof. Richard Milner
MIT
Abstract:
Nuclear physicists have recently made progress in understanding how to visualize the fundamental structure of the proton. Electrons scattered from the proton's charged constituents produce snapshots that offer the possibility to produce for the first time a coherent 3D image of the proton. The basic
elements of the technique will be outlined and ongoing experiments at Jefferson Laboratory as well as future experiments at the planned Electron-Ion Collider (EIC) at Brookhaven Laboratory will be described.
Remote Connection info:
TBA -
Graduate Student Benjamin Commeau, Department of Physics, University of Connecticut, "Two Studies on Topological Properties of Organic Superconductors and a new Quantum Dynamical Simulation Algorithm", PhD Dissertation Defense2:00pm
9/25
Graduate Student Benjamin Commeau, Department of Physics, University of Connecticut, "Two Studies on Topological Properties of Organic Superconductors and a new Quantum Dynamical Simulation Algorithm", PhD Dissertation Defense
Friday, September 25th, 2020
02:00 PM - 04:00 PM
Storrs Campus Video meeting
Graduate Student Benjamin Commeau, Department of Physics,
University of Connecticut
Two Studies on Topological Properties of Organic Superconductors and a new Quantum Dynamical Simulation Algorithm
In this thesis I investigate two research topics in topological organic superconductors and one research topic in variational algorithms for quantum computation.
In the first chapter we investigate the structural and electronic properties of the three structural phases alpha, beta and kappa of (BEDT-TTF)2I3, by performing state of the art ab initio calculations in the framework of density functional theory. We furthermore report about the irreducible representations of the corresponding electronic band structures, symmetry of their crystal structure, and discuss the origin of band crossings.
Additionally, we discuss the chemically induced strain in kappa-(BEDT-TTF)2I3 achieved by replacing the iodine layer with other Halogens: Fluorine, Bromine and Chlorine. In the case of kappa-(BEDT-TTF)2F3, we identify topologically protected crossings within the band structure. These crossings are forced to occur due to the non-symmorphic nature of the crystal. In the second chapter, we performed structural optimization and electronic structure calculations in the framework of density functional theory, incorporating, first, the recently developed strongly constrained and appropriately normed semilocal density functional SCAN, and, second, van der Waals corrections to the PBE exchange correlation functional by means of the dDsC dispersion correction method.
In the case of alpha-(BEDT-TTF)2F3 the formation of over-tilted Dirac-type-II nodes within the quasi 2-dimensional Brillouin zone can be found.
For kappa-(BEDT-TTF)2F3, the recently reported topological transition within the electronic band structure cannot be revealed. In the third chapter, we propose a new algorithm called Variational Hamiltonian Diagonalization (VHD), which approximately transforms a given Hamiltonian into a diagonal form that can be easily exponentiated. VHD allows for fast forwarding, and removes Trotterization error and allows simulation of the entire Hilbert space. We prove an operational meaning for the VHD cost function in terms of the average simulation fidelity. Moreover, we prove that the VHD cost function does not exhibit a shallow-depth barren plateau. Our numerical simulations verify that VHD can be used for fast-forwarding dynamics.
Zoom Link: https://harvard.zoom.us/j/92203325795?pwd=T2VoYzNPNkwvZW1GWFlhQk9Ga1lwUT09