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  • CSP Lunch Seminar Oct 19, 2021

    Markers of Chaotic Locomotion in Swimming C. elegans

    Guest: Susannah Zhang, Physics & Astronomy, University of Georgia
    Tuesday, October 19, 2021 12:45 pm - 1:45 pm
    Location: Zoom Meeting

  • Departmental Colloquium Oct 21, 2021

    Rydberg impurity in a quantum gas: a molecular Lego with quantum statistics

    Guest: Prof. H. R. Sadeghpour, Department of Astronomy Harvard University & Smithsonian Observatory
    Thursday, October 21, 2021 3:55 pm - 4:55 pm
    Location: Physics Auditorium (202) and Zoom

    Impurity physics is a celebrated sub-discipline in condensed matter. Spectroscopy of impurity dynamics in atomic quantum Bose and Fermi gases has invigorated this line of research. Here, I will describe steps we've taken toward understanding how Rydberg quenches in such gases probe quantum correlations and quantum statistics, how oligomeric Rydberg molecules evolve to many-body dressed states and how Fermi statistics inhibits chemical reactivity. I will also touch upon cases when impurity excitations are not isotropic with implications for engineering chiral interactions.

  • CSP Lunch Seminar Oct 26, 2021

    Modeling Rippling and Aggregation Behaviors in Interacting Populations of Myxococcus xanthus

    Guest: Kellan Gibson, Center for Simulational Physics, University of Georgia
    Tuesday, October 26, 2021 12:45 pm - 1:45 pm
    Location: Zoom Meeting

  • Departmental Colloquium Oct 28, 2021

    Collapse of the Collapse: Physicists Return to Reality

    Guest: Prof. Murray Daw, Department of Physics and Astronomy Clemson University
    Thursday, October 28, 2021 3:55 pm - 4:55 pm
    Location: Zoom Meeting

    We note the recent demise of the collapse hypothesis, that an integral part of quantum mechanics is the "collapse" of the state of a system when measured. Using recent work of Anthony Rizzi, we show that the Ensemble Interpretation provides a simple and natural resolution to the problem of measurement in quantum mechanics. Along the way, we give a fuller explanation of the Ensemble Interpretation (in spite of the familiar-sounding name, this is almost entirely unknown), measurement theory in general (correcting many common misconceptions), the resolution of the Schrodinger Cat experiment, Wigner’s Friend experiment, and the Extended Wigner’s Friend experiment. At the end we encourage discussion of how to deal with the pedagogical situation, given that almost all current QM textbooks are based on the (now defunct) collapse hypothesis.

  • Departmental Colloquium Nov 4, 2021

    Scaling down the laws of thermodynamics

    Guest: Prof. C. Jarzynski, Department of Physics University of Maryland, College Park
    Thursday, November 4, 2021 3:55 pm - 4:55 pm
    Location: Zoom Meeting

    Thermodynamics provides a robust conceptual framework and set of laws that govern the exchange of energy and matter. Although these laws were originally articulated for macroscopic objects, nanoscale systems also exhibit “thermodynamic- like” behavior – for instance, biomolecular motors convert chemical fuel into mechanical work, and single molecules exhibit hysteresis when manipulated using optical tweezers. To what extent can the laws of thermodynamics be scaled down to apply to individual microscopic systems, and what new features emerge at the nanoscale? I will describe some of the challenges and recent progress – both theoretical and experimental – associated with addressing these questions. Along the way, my talk will touch on non-equilibrium fluctuations, “violations” of the second law, the thermodynamic arrow of time, nanoscale feedback control, strong system-environment coupling, and quantum thermodynamics.

  • CSP Lunch Seminar Nov 9, 2021

    Replica-Exchange Wang-Landau Simulations of Lattice Model Proteins and Peptides

    Guest: Matthew Wilson, Center for Simulational Physics, University of Georgia
    Tuesday, November 9, 2021 12:45 pm - 1:45 pm
    Location: Zoom Meeting

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