1 citations · 1 across the 8 of their papers we have counts for
8 papers
A Covariant Formulation of Logarithmic Supertranslations at Spatial Infinity
Florian Girelli, Simon Langenscheidt, Giulio Neri +2
We investigate the asymptotic symmetries of asymptotically flat spacetimes at spatial infinity. We propose a new symplectic structure and conservative boundary conditions in a poly…
Chern-Simons corner phase spaces in BF-BB theories
Simon Langenscheidt
We investigate an approach to determine corner Poisson brackets of fields restricted to codimension 2 and 3 surfaces in 4D theories, without making use of boundary conditions. Inst…
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…
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…
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…
Channel-State duality with centers
Simon Langenscheidt, Eugenia Colafranceschi, Daniele Oriti
We study extensions of the mappings arising in usual channel-state duality to the case of Hilbert spaces with a direct sum structure. This setting arises in representations of alge…
Holographic properties of superposed quantum geometries
Eugenia Colafranceschi, Simon Langenscheidt, Daniele Oriti
We study the holographic properties of a class of quantum geometry states characterized by a superposition of discrete geometric data, in the form of generalised tensor networks. T…
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…