1 h 13 min
An algebra of proper observables at null infinity: Dirac brackets, Memory and Goldstone probes
Theoretical Physics, Classical Mechanics and seminar by Rodrigo Andrade E Silva, Perimeter Institute for Theoretical Physics
Thursday 14:30 UTC
Recording available
Waterloo, Canada
Recording
Abstract
The talk develops Dirac brackets and proper observables on the Ashtekar–Streubel phase space with gravitational memory. It examines supertranslation charges, the limitations of shear-only and news-only subalgebras, and why the Goldstone mode itself is not a proper observable. A family of Goldstone probes permits indirect access to that mode, while distributional brackets acquire nonlocal corrections.
Topics
Dirac bracketsAshtekar–Streubel phase spacegravitational memoryproper observablessupertranslation chargesnews-only subalgebrasGoldstone modeGoldstone probesdistributional brackets