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2025

Classical Gravity Cannot Mediate Entanglement by Local Means

Marletto, Chiara, Vedral, Vlatko

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We rebut a recent paper that claims that classical gravity can entangle two massive superpositions by local means.

We refute the misconceptions appearing in this paper and confirm that the quantum features are necessary in the gravitational field if it can lead to entanglement by local propagation between distant masses.

Classical Gravity Cannot Mediate Entanglement by Local Means · Around

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Bose, S. et al., Spin entanglement witness for quantum gravity. Phys. Rev. Lett. 119
2017
Earlier work this paper cites.
Marletto, C. and Vedral, V. Gravitationally induced entanglement between two massive particles is sufficient evidence of quantum effects in gravity. Phys. Rev. Lett. 119
2017
Earlier work this paper cites.

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Marletto C., and Vedral, V., Phys. Rev. D 102
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Aziz, J. and Howl, R., Classical theories of gravity produce entanglement, Nature 646
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Then

Marletto, C. and Vedral, V., Quantum-information methods for quantum gravity laboratory-based tests, Rev. Mod. Phys. 97
2025
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