Past Events

  • Primakoff Lecture: "Dark Matter, Neutron Stars, and Gravitational Waves"

    David Rittenhouse Laboratory, A8

    Ann Nelson, University of Washington

    The recent observation of gravitational waves from merging neutron stars opens a new era for neutron star physics and astrophysics. I discuss the dark matter mystery and some of my work on
    possible ways neutron stars can give clues about dark matter. Dark matter could be captured by neutron stars or their progenitors or produced during a supernovae and subsequently trapped
  • 32nd Primakoff Lecture: "Metamaterials and Topological Mechanics"

    David Rittenhouse Laboratory, A8

    Tom Lubensky (University of Pennsylvania)

    Metamaterials are materials engineered to have a property or properties not found in nature, such as a negative optical index of refraction, one-way light or vibration waves, or exotic elastic behavior.  Advances in materials processing, like 3D printing and laser cutting, over the last 10 to 15 years have made it possible to fabricate metamaterials with made-to-order structure at length scales as short as a micron.