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Signatures of the quantum nature of gravity in the differential motion of two masses

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arxiv 2104.04414 v2 pith:KSCRUZEV submitted 2021-04-09 gr-qc quant-ph

Signatures of the quantum nature of gravity in the differential motion of two masses

classification gr-qc quant-ph
keywords massesquantumgravitysqueezingdetectingdifferentialentanglementmotion
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We show that a signature of the quantum nature of gravity is the quantum mechanical squeezing of the differential motion of two identical masses with respect to their common mode. This is because the gravitational interaction depends solely on the relative position of the two masses. In principle, this squeezing is equivalent to quantum entanglement between the masses. In practice, detecting the squeezing is more feasible than detecting the entanglement. To that end, we propose an optical interferometric scheme to falsify hypothetical models of gravity.

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Cited by 2 Pith papers

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    Non-quantized gravity models that preserve Galilean invariance and reproduce Newtonian interaction on average require a minimal noise injection to remain non-entangling.

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    quant-ph 2024-08 unverdicted novelty 4.0

    Extends prior two-photon formalism to compute true motion and optimal cooling in multi-DOF GW detector test masses, finding sub-unity occupation numbers possible over the oscillator bandwidth for common definitions.