Amplification of Gravitationally Induced Entanglement
arXiv:2202.09737 · doi:10.1103/PhysRevD.106.066013
Abstract
Observation of gravitationally induced entanglement between two massive particles can be viewed as implying the existence of the nonclassical nature of gravity. However, weak interaction in the gravitational field is extremely small so that gravitationally induced entanglement is exceptionally challenging to test in practice. For addressing this key challenge, here we propose a criterion based on the logical contradictions of weak entanglement, which may boost the sensitivity of the signal due to the gravitationally induced entanglement. Specifically, we make use of the weak-value scenario and Einstein-Podolsky-Rosen steering. We prove that it is impossible for a classical mediator to act on two local quantum objects to simulate amplified-weak-value phenomenon in two-setting Einstein-Podolsky-Rosen steering. Our approach can amplify the signal of gravitationally induced entanglement that were previously impossible to observe by any desired factor that depends on the magnitude of the weak value. Our results not only open up the possibility of exploring nonclassical nature of gravity in the near future, but they also pave the way for weak entanglement criterion of a more general nature.
12 pages, 1 figures
References in corpus (19)
- Steering, Entanglement, Nonlocality, and the EPR Paradox
- A Spin Entanglement Witness for Quantum Gravity
- Ultrasensitive Beam Deflection Measurement via Interferometric Weak Value Amplification
- Gravitationally-induced entanglement between two massive particles is sufficient evidence of quantum effects in gravity
- Motional Quantum Ground State of a Levitated Nanoparticle from Room Temperature
- Quantum control of a nanoparticle optically levitated in cryogenic free space
- Anomalous Weak Values Are Proofs of Contextuality
- Precision frequency measurements with interferometric weak values
- Gravitationally Mediated Entanglement: Newtonian Field vs. Gravitons
- Constructor Theory of Information
- Mechanism for the quantum natured gravitons to entangle masses
- Decoherence effects in non-classicality tests of gravity
- Witnessing the non-classical nature of gravity in the presence of unknown interactions
- Enhancing Gravitational Interaction between Quantum Systems by a Massive Mediator
- On two recent proposals for witnessing nonclassical gravity
- Improving resilience of the Quantum Gravity Induced Entanglement of Masses (QGEM) to decoherence using 3 superpositions
- Signatures of the quantum nature of gravity in the differential motion of two masses
- Indirect detection of gravitons through quantum entanglement
- Testing the nonclassicality of spacetime: what can we learn from Bell-Bose et al.-Marletto-Vedral experiments?
Cited by in corpus (5)
- Killing Horizons Decohere Quantum Superpositions
- Mass-independent scheme for enhancing spatial quantum superpositions
- Generating quantum entanglement between macroscopic objects with continuous measurement and feedback control
- Gravitational Harmonium: Gravitationally Induced Entanglement in a Harmonic Trap
- How to Minimize the Decoherence Caused by Black Holes