119 citations · 362 across the 12 of their papers we have counts for
12 papers
Relational path integral, effective actions and quantum frame covariance in gravity
Sergio E. Aguilar-Gutierrez, Renata Ferrero, Philipp A. Hoehn +1
We propose a relational bundle-geometric formulation of the gravitational path integral by invoking the new tool of quantum reference frames (QRFs), which in gravity are gauge-cova…
Edge modes as dynamical frames: charges from post-selection in generally covariant theories
Sylvain Carrozza, Stefan Eccles, Philipp A. Hoehn
We develop a framework based on the covariant phase space formalism that identifies gravitational edge modes as dynamical reference frames. They enable the identification of the as…
Perspective-neutral approach to quantum frame covariance for general symmetry groups
Anne-Catherine de la Hamette, Thomas D. Galley, Philipp A. Hoehn +2
In the absence of external relata, internal quantum reference frames (QRFs) appear widely in the literature on quantum gravity, gauge theories and quantum foundations. Here, we ext…
Quantum reference frame transformations as symmetries and the paradox of the third particle
Marius Krumm, Philipp A. Hoehn, Markus P. Mueller
In a quantum world, reference frames are ultimately quantum systems too -- but what does it mean to "jump into the perspective of a quantum particle"? In this work, we show that qu…
A local quantum Mach principle and the metricity of spacetime
Philipp A Hoehn, Markus P Mueller, Christian Pfeifer +1
We revisit the old question of what distinguishes the formulation of spacetime geometry in terms of a Lorentzian metric physically from more general geometric structures. Our appro…
Switching internal times and a new perspective on the 'wave function of the universe'
Philipp A Hoehn
Despite its importance in general relativity, a quantum notion of general covariance has not yet been established in quantum gravity and cosmology, where, given the a priori absenc…