Physics

Abstract: This talk will discuss the simplest model of neural nets, the multilayer perceptron. We will prove the basic properties of this model, and discuss three particular areas where physicists, especially high energy theorists, can contribute to...

Abstract: Symmetries play a crucial role in both quantum field theory and quantum many-body systems on the lattice. One key topological feature that a global symmetry can have is a "('t Hooft) anomaly". But how exactly should an anomaly be defined...

Abstract: Classical" accretion disks are geometrically thin, radiatively efficient and mechanized by turbulent viscosity. Yet, many observational and theoretical issues challenge this standard model, suggesting that we are missing essential-but...

Abstract: Scalar field theories with cubic interactions and purely imaginary coupling constants describe non-unitary universality classes arising when certain conformal minimal models are continued above two dimensions.  I will discuss two methods...

Abstract: I will review non-geometric string constructions, focusing on asymmetric orbifolds and in particular quasicrystalline orbifolds, which freeze moduli and yield isolated vacua (“string islands”). In the supersymmetric case (N=8,16), these...

Abstract: It is well known that the study and observation of core collapse Supernovae provide powerful tools to probe possible scenarios of physics beyond the Standard Model (SM). In this seminar, I will provide an overview of the mechanisms...