Events at Physics
Events on Thursday, April 18th, 2019
- R. G. Herb Condensed Matter Seminar
- Exciting dynamics in multiple time dimensions
- Time: 10:00 am
- Place: Chambering 5310
- Speaker: Ivar Martin, Argonne National Laboratory
- Abstract: Externally driving a dynamical system, be it quantum or classical, effectively increases the number of its time dimensions. In this talk I will describe how the extra time dimensions can be harnessed to synthesize topological insulators purely in time domain, describe their possible applications for energy conversion and quantum engineering, and point out connections to localization and chaos.
- Host: Vavilov
- Cosmology Journal Club
- Time: 12:00 pm
- Place: 5242 Chamberlin Hall
- Abstract: Please visit the following link for more details:
Feel free to bring your lunch!
If you have questions or comments about this journal club, would like to propose a topic or volunteer to introduce a paper, please email Ross Cawthon (firstname.lastname@example.org) and Santanu Das (email@example.com).
- Theory Seminar (High Energy/Cosmology)
- Why the Higgs is light, Why it has SM couplings to gauge bosons and fermions, and where there are more Higgses to be found.
- Time: 2:30 pm
- Place: 5280 Chamberlin Hall
- Speaker: Ken Lane, Boston University
- Abstract: Current LHC data indicate that H(125) is either the single Higgs of the Standard Model or, to a good approximation, an “aligned Higgs”. We propose that H is the pseudo-Goldstone dilaton of Gildener and Weinberg. This naturally and, we conjecture, uniquely accounts for its low mass and its alignment. It further implies the existence of additional Higgs bosons in ~200 to ~550 GeV. We illustrate this in a version of a 2HDM of Lee and Pilaftsis. Our version is consistent with all published precision EW (LEP) and LHC (ATLAS & CMS) data. We propose tests to confirm or exclude this model with available LHC data.
- Host: Kevin Black
- Astronomy Colloquium
- Diermier Colloquium Talk- Revealing the Atomic Hydrogen in the small Magellanic cloud with the Australian Square Kilmetre Array Pathfinder"
- Time: 3:30 pm
- Place: 4421 Sterling Hall, Coffee and cookies 3:30 PM, Talk begins 3:45 PM
- Speaker: Naomi McClure-Griffiths, The Australian National University
- Abstract: The evolution of galaxies is partially regulated by their infall and outflow of gas. Many simulations of galaxy formation and evolution have highlighted the importance of feedback in reproducing the observable Universe. Huge superbubbles and outflows, formed from the stellar winds and supernovae, dominate the observed structure of neutral hydrogen within many galaxies, including the nearby Small and Large Magellanic Clouds, which we can study with a physical resolution unmatched anywhere else in the Universe. As the most numerous galaxies in the Universe, dwarf galaxies may be important candidates for populating the intergalactic medium with enriched gas. Although star formation rates in dwarf galaxies can be lower than their more massive, starburst counterparts, these low mass systems have small gravitational potential wells and thereby find it difficult to maintain their star-forming material in the presence of intense stellar feedback. In this talk I will present new commissioning atomic hydrogen (HI) data from the Australian SKA Pathfinder (ASKAP) in which we have discovered that the Small Magellanic Cloud (SMC) has massive stellar feedback driven HI outflows. The outflows are comprised of cold filamentary gas extending up ~2 kpc from the main galaxy, with temperatures of T< 500 K and widths as small as 50 pc. We estimate a significant atomic gas mass flux in the range 0.2 - 1 solar mass per year, which may contribute to feeding the Magellanic Stream. I will also discuss future plans for the Magellanic System with Galactic ASKAP Survey.
- Host: Professor Snezana Stanimirovic