Events

  • Condensed Matter Seminar: "Jamming of non-circular and deformable particles"

    David Rittenhouse Laboratory, A4

    Mark Shattuck (City University of New York)

    We study mechanically stable packings of deformable and rigid 2D circulo-polygons using computer simulations. A 2D circulo-polygon is a particle shape formed by the collection of all points equidistant from the edge of a polygon. It is a generalization of the 2D circulo-cylinder and a circle, which are the collections of all points equidistance from a line and a point, respectively. In our model, the circulo-polygon can be deformable, where the only constraint on the particle is that shape factor, the ratio of the area of the polygon to the square of the perimeter, is fixed.

    view more..

  • Joint Mathematics & Physics Seminar: 6D SCFTs and Group Theory

    David Rittenhouse Laboratory, 4C2

    Tom Rudelius (IAS)

    Certain classes of superconformal field theories in six dimensions (6D SCFTs) are in one-to-one correspondence with certain classes of group homomorphisms.  In this talk, we will see that this correspondence allows us to classify homomorphisms that were previously unknown in the mathematics literature and understand aspects of 6D SCFTs that were previously unknown in the physics literature.  We speculate on the implications for the future study of 6D SCFTs and these group homomorphisms.

    view more..

  • High Energy Theory Seminar: (TBA)

    David Rittenhouse Laboratory, 2N36

    Mukund Rangamani (UC Davis)

  • Condensed Matter Seminar: "The Case for an Exciton Metal in Bilayer Graphene"

    David Rittenhouse Laboratory, A4

    Michael Zaletel (Princeton University)

  • HET & HEE Joint Seminar: (TBA)

    Center for Particle Cosmology

    David Shih (Rutgers University)

  • Dissertation Defense: "Rate and State Friction Laws at the Nanoscale"

    David Rittenhouse Laboratory, 3W2

    Kaiwen (Kevin) Tian (U of Penn)

  • Physics Department Colloquium: "Cal-Bridge and CAMPARE/CHAMP: Engaging Underrepresented Students in Physics and Astronomy"

    David Rittenhouse Laboratory - A8

    Alex Rudolph (Cal Poly Pomona) hosted by: James Aguirre

    The level of participation by underrepresented minority (URM) and female students in physics and astronomy PhD programs is shamefully low (2-4% for URM v. 30% in the general population; 20% for women v. 50% in the general population). I will begin by discussing research into why these participation rates are so low for these groups, highlighting role the physics and general GRE tests play in suppressing diversity in our field, while providing little to no benefit in helping predict long-term success.

    view more..

  • High Energy Theory Seminar: (TBA)

    David Rittenhouse Laboratory, 2N36

    Robert Caldwell (Dartmouth College)

  • Condensed Matter Seminar: "Magnetism in Amorphous Alloys"

    David Rittenhouse Laboratory, A4

    Frances Hellman (University of California at Berkeley)

    Most condensed matter textbooks start by introducing crystal symmetries and the periodic lattice as foundational to the field.  Yet, it has long been known that the amorphous structure supports ferromagnetism, superconductivity, and a host of other condensed matter properties.  Superconductivity theory was famously expanded from the original Bloch wave pairing to be described as pairing of electrons with time-reversed wavefunctions to enable explanation of superconductivity in amorphous systems where electrons in the normal state have a mean free path of approximately an

    view more..

  • Hight Energy Theory Seminar: (TBA)

    David Rittenhouse Laboratory, 2N36

    Silviu Pufu (Princeton University)