Past Events

  • Astro Seminar: "Measuring the Polarized Cosmic Microwave Background with POLARBEAR and the Simons Array"

    David Rittenhouse Laboratory, A8

    Frederick Matsuda (University of California) hosted by Mark Devlin

    POLARBEAR is a high resolution polarization sensitive instrument in Chile currently observing the polarized Cosmic Microwave Background (CMB) signal in order to probe the physics of the early universe and inflation. POLARBEAR-2 and the Simons Array are next generation installments currently in development with vastly increased sensitivities that will achieve unprecedented constraints on cosmological parameters such as the tensor-to-scalar ratio and sum of the neutrino masses.

  • Night Skies in the Observatory: "How to find another Earth … Nearby"

    The Franklin Institute

    Professor James Aguirre (UPenn)

    In the last twenty years, the notion that planets exist outside our solar system has moved from informed speculation to hard, observational science.  James will discuss how we find planets outside the solar system, what our prospects are for finding planets truly nearby, and what characteristics those pl

  • Dissertation Defense: "Assembly, Elasticity, and Structure of Lyotropic Chromonic Liquid Crystals and Disordered Colloids"

    LRSM, Reading Room

    Zoey Davidson (UPenn)

  • Dissertation Defense: "Nano/Biosensors Based on Large Area Graphene"

    Singh Center, Room 035

    Pedro Ducos (UPenn)

  • Experimental Particle Physics: "TBA"

    David Rittenhouse Laboratory, 4C8

    Alessandro Tricoli (Brookhaven National Laboratory)

  • High Energy Seminar: "Entanglement, Gravity, and Quantum Error Correction"

    David Rittenhouse Laboratory, 2N36

    Xi Dong (IAS)

    Over the last few years it has become increasingly clear that there is a deep connection between quantum gravity and quantum information. The connection goes back to the discovery that black hole entropy is given by the horizon area. I will present evidence that this is only the tip of the iceberg, and prove that a similar area law applies to more general Renyi entanglement entropies.

  • "Sounds of Silent: Listening to the Universe with Gravitational Waves”

    Penn Museum, Widener Lecture Room, University of Pennsylvania

    Prof. Dr. Alessandra Buonanno, Director at Max Planck Institute for Gravitational Physics, Head of the division Astrophysical and Cosmological Relativity

  • Department Colloquium: "The New Era of Gravitational-Wave Physics and Astrophysics"

    David Rittenhouse Laboratory, A8

    Alessandra Buonanno (MPI Munich) hosted by Justin Khoury

    The detection by LIGO of gravitational waves emitted by coalescing binary black holes heralded a new era in physics and astrophysics. I will review the theoretical work aimed at solving the two-body problem in General Relativity that has paved the way to observe such gravitational-wave signals and highlight the main implications of the discovery focusing on its astrophysical and fundamental physics aspects. I will also discuss the unique science that lies ahead of us with upcoming gravitational-wave observations.

  • Experimental Particle Physics: "TBA"

    David Rittenhouse Laboratory, 4C8

    Allison McCarn (University of Michigan)

  • Math-Bio seminar: "Robust and scalable inference of population history from hundreds of unphased whole-genomes"

    318 Carolyn Lynch Laboratory

    Jonathan Terhorst, University of California, Berkeley

    It has recently been demonstrated that inference methods based on genealogical processes with recombination can reveal past population history in unprecedented detail. However, these methods scale poorly with sample size, which limits resolution in the recent past, and they require phased genomes, which contain switch errors that can catastrophically distort the inferred history.