186 citations · 1.1k across the 23 of their papers we have counts for
8 papers · 1 filter
Internal quantum reference frames for finite Abelian groups
Philipp A. Hoehn, Marius Krumm, Markus P. Mueller
Employing internal quantum systems as reference frames is a crucial concept in quantum gravity, gauge theories and quantum foundations whenever external relata are unavailable. In…
Quantum Relativity of Subsystems
Shadi Ali Ahmad, Thomas D. Galley, Philipp A. Hoehn +2
One of the most basic notions in physics is the partitioning of a system into subsystems, and the study of correlations among its parts. In this work, we explore these notions in t…
The Trinity of Relational Quantum Dynamics
Philipp A. Hoehn, Alexander R. H. Smith, Maximilian P. E. Lock
The problem of time in quantum gravity calls for a relational solution. Using quantum reduction maps, we establish a previously unknown equivalence between three approaches to rela…
Switching quantum reference frames in the N-body problem and the absence of global relational perspectives
Augustin Vanrietvelde, Philipp A. Hoehn, Flaminia Giacomini
Given the importance of quantum reference frames (QRFs) to both quantum and gravitational physics, it is pertinent to develop a systematic method for switching between the descript…
Quantum theory from rules on information acquisition
Philipp A Hoehn
We summarise a recent reconstruction of the quantum theory of qubits from rules constraining an observer's acquisition of information about physical systems. This review of [arXiv:…
Quantum theory from questions
Philipp A Hoehn, Christopher Wever
We reconstruct the explicit formalism of qubit quantum theory from elementary rules on an observer's information acquisition. Our approach is purely operational: we consider an obs…
An operational approach to spacetime symmetries: Lorentz transformations from quantum communication
Philipp A. Hoehn, Markus P. Mueller
In most approaches to fundamental physics, spacetime symmetries are postulated a priori and then explicitly implemented in the theory. This includes Lorentz covariance in quantum f…
Toolbox for reconstructing quantum theory from rules on information acquisition
Philipp A Hoehn
We develop an operational approach for reconstructing the quantum theory of qubit systems from elementary rules on information acquisition. The focus lies on an observer O interrog…