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hep-th2025
Edge modes of tetrad gravity: Unlike diffeomorphisms, all shifts are integrable
Simon Langenscheidt
We present an improved notion of internal tetrad shifts in 4 dimensions which is always integrable in the presence of corners. This allows us to study the fully extended corner sym…
physics.hist-ph2025
Boundaries, frames and the issue of physical covariance
Henrique Gomes, Simon Langenscheidt, Daniele Oriti
We focus on three distinct lines of recent developments: edge modes and boundary charges in gravitational physics, relational dynamics in classical and quantum gravity, and quantum…