High Energy Seminar: "Large N Tensor Models"
Igor Klebanov (Princeton University)
We review the double line notation for the Feynman diagram expansion of N by N matrix models. In the ‘t Hooft large N limit only the planar diagrams survive, and the dual graphs may be thought of as discretized…
Diversity and Inclusion in Physics :"Women in Physics: Understanding and Overcoming Biases and Barriers"
Amy Graves (Swathmore)
Physics is phenomenally successful at taking data on sexless, raceless objects and transforming that information into mathematical laws with highly accurate predictive power. Why, therefore, should gender be an issue…
Condensed Matter Seminar: "Metal chalcogenide semiconductors: Synthesis, electronic structure, light-matter interactions"
Peter Sutter, University of Nebraska
Metal chalcogenides have received attention as two-dimensional (2D) materials beyond graphene. Semiconducting chalcogenides are particularly attractive since they exhibit novel physics such as strongly bound excitons…
Astro Seminar: "Investigation of Kepler-like Laws of Galactic Dynamics In Dispersion-supported Spherical Galaxies and Test of Dark Matter and Modified Gravity Theories"
Kyu-Hyun Chae (Sejong University)
Whether dynamical systems such as galaxies, galaxy clusters and the universe itself are controlled by Einstein’s theory of gravity in conjunction with yet-to-be-identified dark matter/energy or alternatively by…
High Energy Seminar: "Black Holes in Massive Gravity: Time-Dependent Solutions"
Rachel A. Rosen (Columbia University)
When starting with a static, spherically-symmetric ansatz, there are two types of black hole solutions in massive gravity: (i) exact Schwarzschild solutions which exhibit no Yukawa suppression at large distances and…
Math-Bio seminar: " The mathematical foundation of a landscape theory for living matters and life"
Hong Qian (University of Washington)
The physicists' notion of energy is derived from Newtonian mechanics. The theory of thermodynamics is developed based on that notion, and the realization of mechanical energy dissipation in terms of heat. Since the…
High Energy Seminar: "Modular spacetime and Metastring theory"
Djordje Minic (Virginia Tech)
In this talk we review our recent work on metastring theory and its habitat, a new form of quantum spacetime, called modular spacetime. We emphasize that the geometry underlying modular spacetime, i.e. the background…
Condensed Matter Seminar: "Atomic Crystals with New Twists"
Jiwoong Park, Cornell University
Chiral materials possess left- and right-handed counterparts linked by mirror symmetry, with applications in physics, chemistry and biology. In atomic crystals such as graphene, chiral symmetry emerges naturally as a…
Astro Seminar: "Large-Scale Structure Tests of Galaxy Formation and Modified Gravity"
Ying Zu (Ohio State University).
I will present novel tests of galaxy formation theories and the nature of gravity, using large-scale structure measurements from the Sloan Digital Sky Survey (SDSS). I will first introduce the iHOD model, a…