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X-WR-CALNAME:Physics & Astronomy
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X-WR-CALDESC:Events for Physics & Astronomy
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DTSTART;TZID=America/Chicago:20260918T153000
DTEND;TZID=America/Chicago:20260918T170000
DTSTAMP:20260909T142610Z
CREATED:20260825T153241Z
LAST-MODIFIED:20260909T142610Z
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SUMMARY:Physics Colloquium - Chavdar Slavov
DESCRIPTION:Light-driven Molecular Transformations Captured by Ultrafast Spectroscopy\nDr. Chavdar Slavov\, Assistant Professor\, Department of Chemistry\nUniversity of South Florida \nFemtosecond time-resolved spectroscopy reveals the excited-state pathways and chromophore dynamics that transform light absorption into photochemical and biological function.  Using phytochromes\, I will illustrate how the protein environment controls chromophore isomerization\, which in turn initiates structural changes that regulate biological signaling.  Examples of synthetic photoswitches will further demonstrate how molecular motions and interactions direct competing excited-state pathways toward productive or nonproductive photochemistry.  Finally\, I will introduce photopharmacology and show how artificial photoswitches can reversibly control biologically active molecules with light.  Together\, these studies demonstrate how understanding excited-state dynamics bridges photochemistry and biophysics and informs the design of functional photoresponsive systems.
URL:https://uwm.edu/physics/event/physics-colloquium-chavdar-slavov/
LOCATION:Chemistry 108\, 2050 E Kenwood Blvd\, Milwaukee\, WI\, 53201\, United States
CATEGORIES:Physics Colloquia
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BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20260925T153000
DTEND;TZID=America/Chicago:20260925T170000
DTSTAMP:20260904T125309Z
CREATED:20260825T153405Z
LAST-MODIFIED:20260904T125309Z
UID:10435399-1790350200-1790355600@uwm.edu
SUMMARY:Physics Colloquium - Daniel Agterberg
DESCRIPTION:Altermagnets:  A New Technologically Relevant Class of Quantum Magnets\nDaniel Agterberg\nProfessor\, University of Wisconsin-Milwaukee \nMagnetism underpins much of our current information technology.  It also derives purely from quantum mechanics.  Traditionally\, discussion emphasizes two classes of magnets: usual ferromagnets\, which underly data storage devices\, and antiferromagnets\, in which magnetic moments adopt an up-down structural motif.  Recently\, a new class of magnets\, altermagnets\, has generated tremendous interest.  This class mixes properties of ferromagnets and antiferromagnets in a way that is promising for future applications.    \nIn this talk\, after introducing and discussing the quantum mechanical origins of traditional classes of magnetism\, I will turn to altermagnetism to highlight our current understanding of these materials and discuss how this understanding is providing a new lens for future research in quantum magnetism.\n.
URL:https://uwm.edu/physics/event/physics-colloquium-daniel-agterberg/
LOCATION:Chemistry 108\, 2050 E Kenwood Blvd\, Milwaukee\, WI\, 53201\, United States
CATEGORIES:Physics Colloquia
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BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20261002T153000
DTEND;TZID=America/Chicago:20261002T170000
DTSTAMP:20260914T130946Z
CREATED:20260825T153604Z
LAST-MODIFIED:20260914T130946Z
UID:10435400-1790955000-1790960400@uwm.edu
SUMMARY:Physics Colloquium - Tony Rodriguez
DESCRIPTION:From Extreme Binary Stars to Self-Driving Cars\nDr. Tony Rodriguez\nData Scientist\, Waymo LLC (formerly Harvard CfA) \nCompact objects — white dwarfs (WDs)\, neutron stars\, and black holes —  are laboratories for studying extreme physics under conditions unable to be replicated on Earth.  When located in binaries\, it becomes possible to measure properties of compact objects such as magnetic field strength\, temperature\, and the effects of mass transfer from a companion.  In this talk\, I will describe recent advancements in our understanding of WD magnetism.  I will outline how this was done by searching for binary systems in short-lived evolutionary phases using the largest optical and X-ray telescope surveys to date.  I will describe the recent discovery of the slowest-pulsing radio sources in the night sky\, long period radio transients\, and how they may connect to the story of WD magnetism.  I will also discuss results from the first controlled survey of mass-transferring\, helium-rich WD binary systems that orbit each other every twenty minutes.  Space-based interferometers like LISA will detect these systems as millihertz gravitational wave (GW) sources\, and current electromagnetic surveys will be vital to compare to future GW results.   Finally\, I will outline my transition to industry research in autonomous vehicles and how skills from a Physics/Astrophysics degree can transfer to the growing world of artificial intelligence (AI).
URL:https://uwm.edu/physics/event/physics-colloquium-tony-rodriguez/
LOCATION:Chemistry 108\, 2050 E Kenwood Blvd\, Milwaukee\, WI\, 53201\, United States
CATEGORIES:Physics Colloquia
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BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20261009T153000
DTEND;TZID=America/Chicago:20261009T170000
DTSTAMP:20260914T131417Z
CREATED:20260825T154439Z
LAST-MODIFIED:20260914T131417Z
UID:10435401-1791559800-1791565200@uwm.edu
SUMMARY:Physics Colloquium - Wei Kong
DESCRIPTION:Solving Atomic Structures of Molecules and Nanoclusters Using Superfluid Helium Droplet Cooling and Laser Alignment\nWei Kong\nDepartment Head & Professor\, Department of Chemistry – Oregon State University \nWe are building a prototype experimental apparatus to determine the atomic structures of molecules and nanoclusters using electron diffraction.  We use superfluid helium droplets for cooling\, thereby achieving effective field-induced orientation and alignment of the sample species.  Electron diffraction patterns from the chosen orientation can then be accumulated until a satisfactory signal-to-noise ratio can be obtained.  Changing the polarization of the laser changes the orientation of the sample species\, hence three-dimensional structures can be obtained from the diffraction patterns of all orientations.  The electrostatic potential of the sample species is derived using the oversampling method for iterative phase retrieval and structure determination.  We demonstrate the apparatus’s performance using atomic and molecular clusters\, with the ultimate goal of solving macromolecular structures\, such as proteins\, from an electrospray ionization mass spectrometer.  Examples of our recent progress will be discussed\, leading to insights of cluster formation in the unique environment of superfluid helium droplets.
URL:https://uwm.edu/physics/event/physics-colloquium-wei-kong/
LOCATION:Chemistry 108\, 2050 E Kenwood Blvd\, Milwaukee\, WI\, 53201\, United States
CATEGORIES:Physics Colloquia
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BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20261023T153000
DTEND;TZID=America/Chicago:20261023T170000
DTSTAMP:20260914T143615Z
CREATED:20260825T154815Z
LAST-MODIFIED:20260914T143615Z
UID:10435403-1792769400-1792774800@uwm.edu
SUMMARY:Physics Colloquium - Charlotte Ward
DESCRIPTION:Better Together:  Combining the Strengths of Rubin\, Euclid\, and Roman for Time-domain Science and Cosmology\nCharlotte Ward\nAssistant Professor\, Department of Astronomy and Astrophysics in the Eberly College of Sciences at Penn State \nWe have entered an exciting decade for survey science\, with space-based surveys such as Euclid and Roman and ground-based surveys such as Rubin Observatory’s Legacy Survey of Space and Time (LSST) providing overlapping imaging datasets across the optical and IR.  LSST will identify thousands of tidal disruption events (TDEs) and millions of AGN and supernovae – including hundreds of gravitationally lensed supernovae (gLSNe) from which we can measure the Hubble Constant.  I will discuss how joint analysis of ground and space-based data via multi-resolution forward modeling methods is enabling us to identify AGN and TDEs from non-nuclear massive black holes\, undertake time delay cosmography with populations of gLSNe\, and study the environments of supernovae and AGN.  I will also discuss our work on understanding accretion disk physics and radio jet formation in state-changing AGN\, which are important probes of super-Eddington accretion and the duty cycle of massive black hole growth.
URL:https://uwm.edu/physics/event/physics-colloquium-charlotte-ward/
LOCATION:Chemistry 108\, 2050 E Kenwood Blvd\, Milwaukee\, WI\, 53201\, United States
CATEGORIES:Physics Colloquia
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BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20261030T153000
DTEND;TZID=America/Chicago:20261030T170000
DTSTAMP:20260825T155425Z
CREATED:20260825T154919Z
LAST-MODIFIED:20260825T155425Z
UID:10435404-1793374200-1793379600@uwm.edu
SUMMARY:Physics Colloquium - Sabine Botha
DESCRIPTION:Title and abstract to be determined\nSabine Botha\nArizona State University \nTalk title and abstract will be posted prior to the event.
URL:https://uwm.edu/physics/event/physics-colloquium-sabine-botha/
LOCATION:Chemistry 108\, 2050 E Kenwood Blvd\, Milwaukee\, WI\, 53201\, United States
CATEGORIES:Physics Colloquia
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