2.4k citations
- Austrian Academy of SciencesAT973 papers
- Universität InnsbruckAT759 papers
- University of ViennaAT154 papers
- Vienna Center for Quantum Science and TechnologyAT121 papers
- TU WienAT79 papers
- Centre National de la Recherche ScientifiqueFR61 papers
- Institute of Photonic SciencesES56 papers
- Max Planck Institute of Quantum OpticsDE52 papers
- Harvard UniversityUS51 papers
- Leibniz University HannoverDE42 papers
- ETH ZurichCH34 papers
- University of GenevaCH29 papers
11 papers · 1 filter
When does entanglement through gravity imply gravitons?
Nikolaos Mitrakos, Maria Papageorgiou, T. Rick Perche +1
Detection of entanglement through the Newtonian potential has been claimed to support the existence of gravitons, by extrapolating to a thought experiment which demonstrates that c…
Knot invariants and indefinite causal order
Samuel Fedida, Anne-Catherine de la Hamette, Viktoria Kabel +1
We explore indefinite causal order between events in the context of quasiclassical spacetimes in superposition. We introduce several new quantifiers to measure the degree of indefi…
The number of fundamental constants from a spacetime-based perspective
George E. A. Matsas, Vicente Pleitez, Alberto Saa +1
We revisit Duff, Okun, and Veneziano's divergent views on the number of fundamental constants and argue that the issue can be set to rest by having spacetime as the starting point.…
Incompleteness Theorems for Observables in General Relativity
Aristotelis Panagiotopoulos, George Sparling, Marios Christodoulou
The quest for complete observables in general relativity has been a longstanding open problem. We employ methods from descriptive set theory to show that no complete observable on…
Quantum Reference Frames at the Boundary of Spacetime
Viktoria Kabel, Časlav Brukner, Wolfgang Wieland
An analysis is given of the local phase space of gravity coupled to matter to second order in perturbation theory. Working in local regions with boundaries at finite distance, we i…
Metriplectic geometry for gravitational subsystems
Viktoria Kabel, Wolfgang Wieland
In general relativity, it is difficult to localise observables such as energy, angular momentum, or centre of mass in a bounded region. The difficulty is that there is dissipation.…