Physics

Abstract: Recently it was shown that black holes impart a fundamental rate of decoherence on all nearby quantum superpositions [Danielson, Satishchandran, Wald (DSW) 2022], eventually erasing all quantum information in their vicinity.  The effect...

Abstract: I will describe connections between ground states of quantum Hall Hamiltonians with multiple-Landau-level orbitals, whose excitations display either Abelian or non-Abelian braiding statistics, and  (non-holomorphic) symmetric polynomials...

Abstract: I will describe a double scaled matrix and tensor integral whose Feynman diagrams can be organized in a 3d topological expansion which agrees term by term with partition functions of 3d gravity. The integral is taken over CFT2 data, and...

Abstract: A basic tenet of quantum theory is that all elementary particles are either bosons or fermions. Ensembles of bosons or fermions behave differently due to differences in their underlying quantum statistics. Starting in the late 1970’s it...

Abstract: This will be an informal presentation / discussion of the basics of holographic theories that live on Cauchy slices (arXiv:2204.00591), which can be constructed by the TTbar deformation.  Please feel free to bring in questions and I will...

Abstract: How are infrared divergences related to the Shapiro time delay in GR? In this pedagogical lecture aimed at graduate students, we will study the physics of infrared divergences and their imprint on scattering amplitudes. We will mostly work...

Abstract: Recently, many results concerning stable big bang formation have appeared. Most of the results concern stability of spatially homogeneous and isotropic solutions. However, a recent result of Fournodavlos, Rodnianski and Speck (FRS) covers...

Abstract: I will review the operator algebraic formalism that allows to work with quantum spin systems directly in the thermodynamic limit. I will explain how this formalism can be used to prove generalized Lieb-Schultz-Mattis theorems that give...

Abstract: Muon colliders offer a unique path to multi-TeV, high-luminosity lepton collisions. Muon collisions with a center-of-mass energy of 10 TeV or above would offer significant discovery potential where the constituent collision energies exceed...