Journal
PHYSICAL REVIEW D
Volume 104, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.104.126030
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Funding
- UK Quantum Communications Hub Grant [EP/T001011/1]
- Perimeter Institute for Theoretical Physics
- Government of Canada through Industry Canada
- Province of Ontario through the Ministry of Research and Innovation
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The BMV experiment aims to prove that spacetime is nonclassical by observing entanglement generated by gravity, but local hidden variable theories can simulate this entanglement. By extending the entanglement from the BMV experiment to distant quantum particles in a Bell experiment, violating a Bell inequality would rule out LHVTs, providing stronger evidence for the nonclassicality of spacetime.
The Bose et al.-Marletto-Vedral (BMV) experiment [S. Bose et al., Phys. Rev. Lett. 119, 240401 (2017); C. Marletto and V. Vedral, Phys. Rev. Lett. 119, 240402 (2017)] aims to prove that spacetime is nonclassical by observing entanglement generated by gravity. However, local hidden variable theories (LHVTs) can simulate the entangled correlations. We propose to extend the entanglement generated by the BMV experiment to distant quantum particles in a Bell experiment. Violating a Bell inequality would rule out LHVTs, providing a stronger proof of the nonclassicality of spacetime than the BMV proposal.
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