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This Week at Physics

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Events During the Week of September 29th through October 6th, 2019

Monday, September 30th, 2019

Plasma Physics (Physics/ECE/NE 922) Seminar
Experiments on ExB shear instabilities and vortex dynamics in pure electron plasmas
Time: 12:05 pm
Place: 2241 Chamberlin Hall
Speaker: Noah Hurst, UCSD
Host: John Sarff
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Tuesday, October 1st, 2019

Chaos & Complex Systems Seminar
The poetry of chaos
Time: 12:05 pm
Place: 4274 Chamberlin (refreshments will be served)
Speaker: Robin Chapman, UW Department of Communication Sciences and Disorders
Abstract: I have been writing poetry on the nonlinear, dynamic aspects of life, climate change, and our discussions of chaos for the past twenty years and will read selected work, including poems from my recently published book The Only Home We Know (Tebot Bach, 2019)
Host: Clint Sprott
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Council Meeting
Physics Council Meeting
Time: 3:00 pm
Place: 2314 Chamberlin Hall
Speaker: Sridhara Dasu, UW-Madison
Host: Sridhara Dasu, Department Chair
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Wednesday, October 2nd, 2019

Department Meeting
Department Meeting
Time: 12:15 pm
Place: B343 Sterling Hall
Speaker: Srihara Dasu, UW-Madison
Host: Department Chair
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Thursday, October 3rd, 2019

R. G. Herb Condensed Matter Seminar
WORLD DAIRY EXPO
Time: 12:00 am
Place:
Abstract: October 1-5, 2019
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R. G. Herb Condensed Matter Seminar
TBD
Time: 11:00 am
Place: 5310 Chamberlin Hall
Speaker: Uwe Bergmann
Abstract: TBD
Host: Gilbert
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Theory Seminar (High Energy/Cosmology)
Developments in the Bagger-Witten line bundle
Time: 3:30 pm
Place: Chamberlin 5280
Speaker: Eric Sharpe, Virginia Tech
Abstract: This talk will concern advances in understanding explicitly the Bagger-Witten line bundle appearing in four-dimensional N=1 supergravity. This has recently been a subject of interest, but explicit examples have proven elusive in the past. In this talk we will outline some recent advances, including (1) a description of the Bagger-Witten line bundle on a moduli space of Calabi-Yau's as a line bundle of covariantly constant spinors (resulting in a square root of the Hodge line bundle of holomorphic top-forms), (2) results suggesting that it (and the Hodge line bundle) is always flat, but possibly never trivial. We will propose its nontriviality as a new criterion for existence of UV completions of four-dimensional supergravity theories. If time permits, we will explicitly construct an example, to concretely display these properties, and outline results obtained with Ron Donagi and Mark Macerato for other cases.
Host: Gary Shiu
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Friday, October 4th, 2019

Physics Department Colloquium
TBD
Time: 3:30 pm
Place: 2241 Chamberlin Hall
Speaker: Brad Pierce, UW Space Sciences and Engineering Center
Host: Susan Nossal
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