Events

Condensed Matter Seminar: "Jamming of noncircular and deformable particles"
September 27, 2017  4:00 pm  5:00 pm
David Rittenhouse Laboratory, A4
Mark Shattuck (City University of New York)
We study mechanically stable packings of deformable and rigid 2D circulopolygons using computer simulations. A 2D circulopolygon 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 circulocylinder and a circle, which are the collections of all points equidistance from a line and a point, respectively. In our model, the circulopolygon 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.
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Joint Mathematics & Physics Seminar: 6D SCFTs and Group Theory
September 28, 2017  4:30 pm
David Rittenhouse Laboratory, 4C2
Tom Rudelius (IAS)
Certain classes of superconformal field theories in six dimensions (6D SCFTs) are in onetoone 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.
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High Energy Theory Seminar: (TBA)
October 2, 2017  2:00 pm
David Rittenhouse Laboratory, 2N36
Mukund Rangamani (UC Davis)

Condensed Matter Seminar: "The Case for an Exciton Metal in Bilayer Graphene"
October 4, 2017  4:00 pm  5:00 pm
David Rittenhouse Laboratory, A4
Michael Zaletel (Princeton University)

HET & HEE Joint Seminar: (TBA)
October 10, 2017  1:30 pm
Center for Particle Cosmology
David Shih (Rutgers University)

High Energy Theory Seminar: (TBA)
October 16, 2017  2:00 pm
David Rittenhouse Laboratory, 2N36
Robert Caldwell (Dartmouth College)

Condensed Matter Seminar: "Magnetism in Amorphous Alloys"
October 18, 2017  4:00 pm  5:00 pm
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 timereversed wavefunctions to enable explanation of superconductivity in amorphous systems where electrons in the normal state have a mean free path of approximately an
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Hight Energy Theory Seminar: (TBA)
October 23, 2017  2:00 pm
David Rittenhouse Laboratory, 2N36
Silviu Pufu (Princeton University)

Condensed Matter Seminar: "TBA"
October 25, 2017  4:00 pm  5:00 pm
David Rittenhouse Laboratory, A4
Cherie Kagan (University of Pennsylvania)

Condensed Matter Seminar: "Dark Matter Superfluidity"
November 1, 2017  4:00 pm  5:00 pm
David Rittenhouse Laboratory, A4
Justin Khoury (University of Pennsylvania)
In this talk I will discuss a theory of superfluid dark matter. The scenario matches the predictions of the standard LambdaColdDarkMatter (LambdaCDM) model on cosmological scales while simultaneously reproducing the MOdified Newtonian Dynamics (MOND) empirical success on galactic scales.
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