3 papers
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…
gr-qc2024
New edge modes and corner charges for first-order symmetries of 4D gravity
Simon Langenscheidt, Daniele Oriti
We present a set of noncommuting frame-translation symmetries in 4D gravity in tetrad-connection variables, which allow expressing diffeomorphisms as composite transformations. Wor…
quant-ph2022
Superposed Random Spin Tensor Networks and their Holographic Properties
Simon Langenscheidt
We study criteria for and properties of boundary-to-boundary holography in a class of spin network states defined by analogy to projected entangled pair states (PEPS). In particula…