Testing the nonclassicality of spacetime: What can we learn from Bell–Bose <i>et al.</i>-Marletto-Vedral experiments?
Adrian Kent, Damián Pitalúa-García
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.
Topics & Concepts
Quantum entanglementSpacetimePhysicsBell's theoremBell test experimentsQuantum mechanicsTheoretical physicsLocal hidden variable theoryQuantumHidden variable theoryMathematical physicsQuantum Mechanics and ApplicationsQuantum Electrodynamics and Casimir EffectQuantum Information and Cryptography