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Explore a high-energy theory seminar where Penn State University's Radu Roiban delves into the application of on-shell methods to local observables, particularly focusing on asymptotic radiation fields and gravitational waveforms. Learn how these observables, while invariant under small gauge transformations, depend on asymptotic gauge choices in gravity on asymptotically Minkowski spacetimes. Discover a comprehensive method for capturing supertranslations within this framework across all orders of perturbation theory, and understand its relationship to classical general relativity results. Gain insights into the calculation of gravitational waveforms using the on-shell approach and their connection to BMS frame choices.
