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On Soft Theorems and Asymptotic Symmetries in Four Dimensions
(2018-05-11)
It was recently discovered that soft theorems, Ward identities associated to asymptotic symmetries, and the memory effect in gravity and gauge theories are in fact mathematically equivalent. This is a rather remarkable ...
Opening the Black Box of Neural Nets: Case Studies in Stop/top Discrimination
(2018-05-13)
In this thesis we examine several different approaches for deducing observable signals of new physics. First, we outline a technique to extract useful information about the pattern a neural network has learned to recognize, ...
Precision Tunneling Rate Calculations in Quantum Field Theory and the Ultimate Fate of Our Universe
(2018-05-09)
One of the most concrete implications of the discovery of the Higgs boson is that, in the absence of physics beyond the Standard Model, the long-term fate of our universe can now be established through precision calculations. ...
Aspects of Symmetry in Asymptotically Flat Spacetimes
(2018-05-11)
We explore the nature and implications of a variety of asymptotic symmetry groups associated to gauge theory and quantum gravity in asymptotically flat spacetimes. We re-express Weinberg's soft graviton theorem as a Ward ...
Universal non-local observables at quantum critical points
(2018-05-11)
This dissertation is devoted to the study of universal observables in quantum critical systems, most of which have a non-local character. The overarching goal of this work is to compute new universal observables of critical ...