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Events During the Week of November 6th through November 12th, 2022

Monday, November 7th, 2022

Academic Calendar
Enrollment appointment times for Spring term assigned to students (throughout week)
Abstract: *Note: actual end time may vary.* CONTACT: 262-3811, URL:
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Plasma Physics (Physics/ECE/NE 922) Seminar
The magnetic field scale length: an influential property of stellarators
Time: 12:00 pm
Place: 1610 Engineering Hall
Speaker: Matt Landreman, University of Maryland
Abstract: A scale length can be defined based on the gradient of the magnetic field vector. This information can be useful for optimizing magnetic fields for fusion and understanding constraints on the magnets that produce them. Here we present two applications for the stellarator fusion concept. First, when expanding about the magnetic axis, maximizing the field scale length can increase the volume in which quasisymmetry is achieved. Second, the field scale length is shown to constrain how far away the electromagnetic coils can be from the plasma. Increasing the field scale length can therefore improve confinement, increase clearances for engineering, and reduce the size and cost of a fusion reactor.
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Tuesday, November 8th, 2022

Academic Calendar
Election Day
Time: 7:00 am
Abstract: Election includes Governor, Congress, State Legislature. Election includes Governor, Congress, State Legislature, Attorney General, Lt. Gov, Sec of State, Treasurer, Clerk of Circuit Court, and Sheriff. Go to to find your polling place, see what is on your ballot, and check your registration. If you are not registered at your current address, you can register at your polling place on Election Day. See for information on registration and voter ID. CONTACT: URL:
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Network in Neutrinos, Nuclear Astrophysics, and Symmetries (N3AS) Seminar
A status update on the Galactic Center GeV gamma-ray excess
Time: 2:00 pm
Place: Join Zoom Meeting Meeting ID: 912 3071 4547
Speaker: Tracy Slatyer , MIT
Abstract: The inner region of the Milky Way Galaxy hosts a central glow of gamma rays often called the Galactic Center Excess. This excess is highly statistically significant and has garnered great interest as a possible signal of either dark matter particles colliding and annihilating, or a previously undiscovered population of pulsars in the stellar bulge. I will briefly outline the history of our understanding of the excess and the arguments for various interpretations, attempt to describe the current status of the controversy including recent developments, and discuss some future paths forward.
Host: Baha Balantekin
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MRSEC Seminar
New Frontiers in Nanoscale Magnetism: Towards Three-Dimensional Materials and Devices
Time: 3:00 pm
Place: Materials Science & Engineering Building, Room 265
Speaker: Amalio Fernández-Pacheco, Institute of Nanoscience & Materials of Aragón CSIC-University of Zaragoza, Spain
Abstract: The expansion of nanomagnetism to three dimensions provides exciting opportunities to explore new physical phenomena and opens great prospects to create 3D magnetic devices for green computing technologies.
In this talk, I will present some of our recent works dedicated to the investigation of three dimensional artificial magnetic materials, including multilayered and complex-shaped geometries. The talk will give an overview of the new methods we have developed to fabricate and characterize these nanomaterials, and some of the new functionalities obtained. This includes the creation of localized spin textures, topological defects and stray fields exploiting geometrical effects, the automotive 3D motion of domain walls, and the generation of chiral spin interactions via geometry and interfacial effects.
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Theory Seminar (High Energy/Cosmology)
Cosmological Constant and Gravitino Mass: Statistical Correlations from the Nilpotent Goldstino Formalism.
Time: 4:00 pm
Place: Chamberlin 5280
Speaker: Kajal Singh, Harish-Chandra Research Institute
Abstract: We obtain the joint distribution function of the gravitino mass and the cosmological constant in KKLT and Large Volume Scenario models with an anti-D3 brane at the bottom of a warped throat as the uplift sector. Moduli stabilisation is incorporated so that we sample only over points corresponding to vacua. The effects of the anti-D3 brane are computed using the nilpotent goldstino formalism. The distribution function for the hierarchies of warped throats serves as a key input. In the limit of zero cosmological constant, we find that the distribution functions are tilted favourably towards lower scales of supersymmetry breaking.
Host: George Wojcik
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Wednesday, November 9th, 2022

Department Meeting
Time: 12:15 pm
Place: B343 Sterling Hall
Speaker: Mark Eriksson, UW-Madison, Physics
Monthly Department Meeting
Host: Mark Eriksson
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Wednesday Nite @ The Lab
Can X-rays Trace the Origins of Printing?
Time: 7:00 pm
Place: free and open to the public; Biotech Bldg auditorium or register for zoom link at
Speaker: Minhal Gardezi, UW–Madison physics graduate students
Host: Tom Zinnen
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Thursday, November 10th, 2022

R. G. Herb Condensed Matter Seminar
Scanning tunneling spectroscopy of unconventional superconductors
Time: 10:00 am
Place: 5310 Chamberlin
Speaker: Pavlo Sukhachov, Yale
Abstract: Motivated by recent experimental observations of unconventional superconductivity in twisted bilayer and trilayer graphenes, we develop a theory describing the differential conductance between a normal STM tip and a 2D superconductor with an arbitrary gap structure. Our analytical scattering theory accounts for Andreev reflections, which become prominent at larger transmission between the tip and the superconductor. Exploiting the dependence of Andreev reflection on the relative position of the STM tip with respect to the lattice symmetry points, we show that the structure of the superconducting gap can be extracted by combining weak- and strong-tunneling limits of differential conductance. Furthermore, the theory incorporates a tip-induced scattering potential within the 2D material, which allows us to describe subgap resonances.
Host: Alex Levchenko
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Plasma Physics (Physics/ECE/NE 922) Seminar
Let's Talk Fusion Energy
Time: 2:15 pm
Place: 1003 Engineering Centers Building, Tong Auditorium
Speaker: U.S. Department of Energy ARPA-E Program Director, et al., U.S. DOE
Abstract: We have a delegation from the Department of Energy and ARPA-E visiting UW Madison, and they are offering a town hall event on Thursday at 2.15 PM. Please see the attached flyer. Everybody is invited to participate. We hope you can attend this important event, which will be an opportunity to discuss recent program developments to accelerate the path to commercial fusion energy. Scott Hsu, DOE Lead Fusion Coordinator, Office of the Under Secretary for Science and Innovation Ahmed Diallo, Program Director, ARPA-E Sam Wurzel, Technology-to-Market Advisor, ARPA-E Katharine Greco, Fellow, ARPA-E Ed Cruz, Tech SETA, ARPA-E (Booz Allen Hamilton) Ziaur Rahman, Tech SETA, ARPA-E (Booz A t at the University of Maryland – College Park
Host: Oliver Schmitz
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Astronomy Colloquium
The Roman Galactic Exoplanet Survey
Time: 3:30 pm
Place: 4421 Sterling Hall
Speaker: Prof. Scott Gaudi, Ohio State University
Abstract: I summarize the scientific motivation and properties of the Roman Galactic Exoplanet Survey (RGES), one possible realization of the Galactic Bulge Time Domain Survey, which itself is one of three core community surveys that will be carried out with NASA’s Nancy Roman Space Telescope (Roman). The notional RGES survey will consist of photometric monitoring of a ~2 sq. degree area toward the Galactic bulge every 15 minutes in a wide, 1-2 micron filter in order to search for cold planets using gravitational microlensing. The survey will consist of six ~72-day seasons, with most of the seasons being concentrated early and late in the nominal 5-year Roman prime mission. I will summarize the expected yield of the RGES survey, and then describe future activities in preparation for, and further definition of, the Galactic Bulge Time Domain Survey.
Host: Ke Zhang
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Friday, November 11th, 2022

Wisconsin Quantum Institute
Vescent Photonics: Overview of Technologies & Student Opportunities
Time: 12:05 pm
Place: 5310 Chamberlin
Speaker: Eduardo Oteiza, Vescent Photonics
Abstract: Eduardo Oteiza, Ph.D., will present how Vescent Photonics has become one of the leading designers and manufacturers of lasers, electro-optic tools, and control electronics used in precision optical measurements. Eduardo will provide an overview of their field-deployable products which enable state-of-the-art timing, time transfer, frequency transfer, quantum computing, precision navigation in both GPS-enabled & GPS-denied environments, next-generation spectroscopic techniques, and a host of other applications propelled by Quantum 2.0.
Eduardo will spend the second half of his talk in a more informal session with students, describing some internship and job opportunities available at Vescent for 2023. Undergraduate and graduate students interested in joining a quantum company that has knowledge in circuits, photonics, mechanical systems, and software programming should be sure to attend and bring their questions.

Host: Thad Walker
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Physics Department Colloquium
On the Threshold of Laser Fusion Ignition and the Pathway to Inertial Fusion Energy
Time: 3:30 pm
Place: 2241 Chamberlin Hall
Speaker: Tammy Ma, LLNL
Host: Ellen Zweibel
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Saturday, November 12th, 2022

Atomic Physics Seminar
Midwest Cold Atom Workshop
Time: 9:00 am
Place: Chamberlin Hall
Speaker: Various, Various
Abstract: To register:
Host: Deniz Yavuz
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