Events

Events at Physics

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Events During the Week of August 9th through August 16th, 2020

Monday, August 10th, 2020

No events scheduled

Tuesday, August 11th, 2020

Academic Calendar
Election Day for Wisconsin, including same-day registration
Time: 7:00 am - 8:00 pm
Abstract: Wisconsin Primary Election for US Rep., State legislature, DA, County Clerk, Treasurer, and Reg of Deeds.. Partisan primary election for US Representative, State legislature, District Attorney, County Clerk, Treasurer, and Register of Deeds. Go to MyVote.wi.gov to find your assigned 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 vote.wisc.edu for information on registration and voter ID. (The final election for these contests will be November 3.) CONTACT: malischke@yahoo.com URL:
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Network in Neutrinos, Nuclear Astrophysics, and Symmetries (N3AS) Seminar
On massive neutrino emission from primordial black holes via Hawking radiation
Time: 3:30 pm
Place:
Speaker: Yuber F. Perez-Gonzalez, Northwestern
Host: Baha Balantekin
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Wednesday, August 12th, 2020

Physics Meets ML
Discovering new phases of matter with unsupervised and interpretable support vector machines
Time: 11:00 am - 12:00 pm
Place: Please register for this online event:
Speaker: Lode Pollet, LMU Munich
Abstract: I present the Tensorial Kernel Support Vector Machine (TK-SVM) as a tool to automate the classification of complicated phase diagrams for classical systems, which is a complicated task when multiple phases coexist and orders compete, as is frequently the case in frustrated magnetism. The key property is the interpretability of the decision function, from which the physical local order parameter can be deduced irrespective of its rank. Furthermore, we discuss a second intrinsic parameter of TK-SVM, the bias, which can be given a distinct physical meaning and which allows one to make an unsupervised graph analysis of the topology of the phase diagram. We illustrate our tool for the classical XXZ model on the frustrated pyrochlore lattice. Unexpectedly, TK-SVM could also learn local constraints hinting at various types of spin liquids resulting in a complete classification of all types of behavior for this model. TK-SVM was subsequently applied to the Kitaev materials where we found a new type of magnetic order as well as new explicit formula’s for the local constraints of certain spin liquids, proving the usefulness of TK-SVM in going beyond the state of the art.

References:

Phys. Rev. B 99, 060404 (2019)
Phys. Rev. B 99, 104410 (2019)
Phys. Rev. B 100, 174408 (2019)
preprint arXiv:2004.14415 (2020)
Host: Shiu
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Thesis Defense
Role of Stable Eigenmodes in Shear-flow Instability Saturation and Turbulence
Time: 12:00 pm - 2:00 pm
Place: virtual
Speaker: Adrian Fraser, Physics PhD Graduate Student
Abstract: Join Zoom Meeting Meeting ID: 510 013 3208 Passcode: 53706 One tap mobile +13126266799,,5100133208# US (Chicago) +16468769923,,5100133208# US (New York) Dial by your location +1 312 626 6799 US (Chicago) +1 646 876 9923 US (New York) +1 301 715 8592 US (Germantown) +1 253 215 8782 US (Tacoma) +1 346 248 7799 US (Houston) +1 408 638 0968 US (San Jose) +1 669 900 6833 US (San Jose) Meeting ID: 510 013 3208 Find your local number:
Host: Paul Terry, Faculty Advisor
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Thesis Defense
Identifying and Exploiting Structure in Cosmological and String Theoretic Data
Time: 1:00 pm - 2:00 pm
Place: Virtual
Speaker: Alex Cole, Physics PhD Graduate Student
Abstract: Meeting ID: 979 7763 2946 Passcode: email acole4@wisc.edu for passcode
Host: Gary Shiu, Faculty Advisor
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Academic Calendar
Masters in Learning Analytics Webinar
Time: 4:00 pm - 4:30 pm
Abstract: Informational session to learn about the program. Join the Masters in Learning Analytics program director to learn more about the 24-month online program and get your questions answered. Simply sign up for this free event on the program's home page. CONTACT: 858-337-5858, jrutledge@wisc.edu URL:
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Thursday, August 13th, 2020

Department Coffee Hour
Time: 3:00 pm - 4:00 pm
Place:
Abstract: Join us weekly for an informal virtual coffee hour! Catch up with others in the department, tell us how things are going, and impress everyone with your Zoom background skills. Coffee Hour is open to any and all faculty, staff, and students in the department.

Sometimes we have a topic, and we'll try to get that topic posted here in advance or sent out by email before each coffee hour.
Host: Department
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Friday, August 14th, 2020

Madison Astronomical Society monthly meeting
A Brief History of Time(keeping): Optical atomic clocks and their applications
Time: 7:30 pm - 8:30 pm
Place: virtual, email to madisonastro.info@gmail.com by noon Friday August 14 to receive the zoom link
Speaker: Shimon Kolkowitz
Abstract: At the August MAS meeting, our guest speaker will be Shimon Kolkowitz of the UW-Madison physics department (assistant professor). Due to COVID-19 restrictions, this meeting will again be held via Zoom.

If you would like to attend the MAS virtual meeting, send an email to madisonastro.info@gmail.com by noon Friday August 14 to let us know of your interest. We will email you the Zoom link at 3pm Friday August 14 that will get you into the meeting at 7:30 on Friday evening.

http://madisonastro.org/featured-events/a-brief-history-of-timekeeping-optical-atomic-clocks-and-their-applications/
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