Archive of IAS Physics Group Meetings

Abstract: Understanding quantum gravity in a closed universe is a long standing problem, where it is challenging even to discuss what observables are meaningful, particularly when thinking about dynamics. Indeed, most discussions in de Sitter are in...

Abstract: The Navier–Stokes (NS) equations describe fluid dynamics through a high-dimensional, nonlinear partial differential equations (PDEs) system. Despite their fundamental importance, their behavior in turbulent regimes remains incompletely...

Abstract: We develop a non-perturbative definition of RMT2: a generalization of random matrix theory that is compatible with the symmetries of two-dimensional conformal field theory. Given any random matrix ensemble, its n-point spectral...

Abstract: The 1+1-dimensional adjoint QCD theory (namely SU(N) gauge theory coupled to a Majorana fermion in the adjoint representation of the gauge group) has two curious properties.  When the fermion is massless, the theory exhibits screening of...

Abstract: Can we regularize chiral global symmetries and their anomalies on a lattice with a finite dimensional Hilbert space? We discuss how the vector and axial U(1) symmetries of a massless Dirac fermion in 1+1d are realized in the conventional...

Abstract: Energy and information are deeply connected in quantum field theory and quantum gravity. I will describe an explicit protocol for an observer outside a black hole to send in quantum information at zero energy cost. This clarifies what sort...

Abstract: A new manifestly spacetime-supersymmetric prescription for superstring amplitude computations is given using the pure spinor formalism which does not contain subtleties from poles in the pure spinor ghosts. This super-Poincare covariant...

Abstract: A remarkably simple idea makes it possible to put global positive coordinates on moduli spaces of curves. I will give an update on recent developments in understanding these coordinates and applying them moduli space integrals. Interesting...