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Events During the Week of April 21st through April 28th, 2024

Monday, April 22nd, 2024

No events scheduled

Tuesday, April 23rd, 2024

Preliminary Exam
Nonlocal transport effects in electron bilayers
Time: 12:00 pm - 2:00 pm
Place: 5280 Chamberlin
Speaker: Dmitry Zverevich, Physics Graduate Student
Abstract: With the discoveries of novel materials, efforts are underway to create hybrid multilayers by stacking them together to form complex heterostructures and to explore new emergent fundamental physics governed by electron correlations. Experimental results on drag resistivity between quantum wires and double-layer graphene heterostructures triggered theoretical works, including new proposals for the mechanisms of this phenomenon. I am going to talk about the predictive theory of Coulomb drag and its relative phenomenon of near-field heat transfer in the context of correlated electron phases and investigate unexplored regimes of quantum transport in various mesoscale systems.
Host: Alex Levchenko
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Wednesday, April 24th, 2024

No events scheduled

Thursday, April 25th, 2024

R. G. Herb Condensed Matter Seminar
Title to be announced
Time: 10:00 am
Place: 5310 Chamberlin
Speaker: Peter Schmelcher, U Hamburg
Host: Mark Saffman
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Preliminary Exam
Progress towards cooling and imaging on an alkali atom forbidden transition
Time: 11:00 am - 1:00 pm
Place: Sterling Hall B343
Speaker: Jacob Scott, Physics PhD Graduate Student
Abstract: I present progress towards atomic manipulation on the 6S1/2 - 5D5/2 forbidden transition in Cs. I discuss a few intriguing features of this transition, including a very high pump-depump ratio, very low Doppler temperature, and an intermediate state that allows for background free imaging. I also discuss development of the experimental apparatus and preliminary results of the experiment.
Host: Mark Saffman
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NPAC (Nuclear/Particle/Astro/Cosmo) Forum
NOvA cross section measurements
Time: 2:30 pm - 3:30 pm
Place: 5310 Chamberlin Hall
Speaker: Prabhjot Singh, Queen Mary University of London
Abstract: tbd
Host: Brian Rebel
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Astronomy Colloquium
Goodbye to “Chi-by-Eye” : Results from a Bayesian Analysis of Photometric Binaries in Open Clusters
Time: 3:30 pm - 4:30 pm
Place: 4421 Sterling Hall
Speaker: Aaron M Geller, Northwestern University
Abstract: Binary and higher-order multiple stars are ubiquitous, and their evolution can be dramatically influenced by their environment. Binaries in the field evolve essentially in isolation, while those within star clusters may experience frequent close stellar encounters that can significantly modify, and even disrupt, their orbits. Most stars like our Sun are believed to be born in star clusters, many of which dissolve to populate the field. Therefore, our interpretation of the observed binary populations in star clusters and the field (and even to some extent our understanding of star formation), relies on how a population of stars evolves through this more dynamically active stage in a star cluster. In this talk, I will provide an overview of the work my team and collaborators are pursuing to identify and analyze photometric binaries in galactic open clusters, in order to test predictions of star cluster models and learn about the dynamical state of our galactic open cluster population.
Host: Ke Zhang
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Friday, April 26th, 2024

Physics Department Colloquium
Structure and Dynamics from Random Observations
Time: 3:30 pm - 5:00 pm
Place: Chamberlin 2241
Speaker: Abbas Ourmazd, University of Wisconsin-Milwaukee
Abstract: Don’t be a control freak. At weddings, the bridal photo is taken under bright lights, with the happy couple holding still. Traditionally in science, the “best” observations are those with the largest signal from the most tightly controlled system. Like bridal photos, the results are not always exciting. In a wide range of phenomena – from the dance of proteins during their function, to the breaking of molecular bonds on the femtosecond scale – tight control is neither possible, nor desirable. Modern data-analytical techniques extract far more information from random sightings than usually obtained from set-piece experiments. I will describe on-going efforts to extract structural and dynamical information from noisy, random snapshots. Examples will include YouTube videos, the structure and conformations of molecular machines such as the ribosome, and the ultrafast dynamics of bond-breaking in small molecules like nitrogen. Less can be more, but only if there is plenty of it.
Host: Uwe Bergmann
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