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Quantum-gravity effects could in principle be witnessed in neutrino-like oscillations

Abstract:
Two of us (Marletto and Vedral 2017 Phys. Rev. Lett. 119 240402) recently showed how the quantum character of a physical system, in particular the gravitational field, can in principle be witnessed without directly measuring observables of that system, solely by its ability to mediate entanglement between two other systems. Here we propose a variant of that scheme, where the entanglement is again generated via gravitational interaction, but now between two particles both at sharp locations (very close to each other) but each in a superposition of two different masses. We discuss an in principle example using two hypothetical massive, neutral, weakly-interacting particles generated in a superposition of different masses. The key property of such particles would be that, like neutrinos, they are affected only by weak nuclear interactions and gravity.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1088/1367-2630/aad5d8

Authors


More by this author
Institution:
University of Oxford
Division:
MPLS Division
Department:
Physics
Sub department:
Atomic & Laser Physics
Role:
Author
ORCID:
0000-0002-2690-4433
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Atomic & Laser Physics
Oxford college:
Wolfson College
Role:
Author


Publisher:
IOP Publishing
Journal:
New Journal of Physics More from this journal
Volume:
20
Issue:
8
Article number:
083011
Publication date:
2018-08-07
Acceptance date:
2018-07-25
DOI:
EISSN:
1367-2630
ISSN:
1367-2630


Keywords:
Pubs id:
pubs:910827
UUID:
uuid:9a946f6d-908c-489e-a6a2-4eab7ea1ce64
Local pid:
pubs:910827
Source identifiers:
910827
Deposit date:
2019-10-21

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