Testing the nonclassicality of spacetime: what can we learn from Bell-Bose et al.-Marletto-Vedral experiments?
arXiv:2109.02616 · doi:10.1103/PhysRevD.104.126030
Abstract
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.
A few typos in the text and references corrected. Published version
References in corpus (16)
- Satellite-to-ground quantum key distribution
- A Spin Entanglement Witness for Quantum Gravity
- Gravitationally-induced entanglement between two massive particles is sufficient evidence of quantum effects in gravity
- Advances in Space Quantum Communications
- Underground test of gravity-related wave function collapse
- Quantum Gravity Witness via Entanglement of Masses: Casimir Screening
- Why Eppley and Hannah's Experiment Isn't
- Measurement Analysis and Quantum Gravity
- Non-Gaussianity as a signature of a quantum theory of gravity
- Using an atom interferometer to infer gravitational entanglement generation
- Quantum Technologies in Space
- On two recent proposals for witnessing nonclassical gravity
- Testing the foundations of quantum physics in space Interferometric and non-interferometric tests with Large Particles
- Tests of Quantum Gravity near Measurement Events
- Self gravity decoheres quantum systems
- Quantum State Readout, Collapses, Probes and Signals
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