



01340nas a2200133   4500008004100000245006500041210006500106260001400171520092300185100001901108700002001127700002201147856003701169       2021                        eng d00aTesting quantum gravity with interactive information sensing0 aTesting quantum gravity with interactive information sensing  c1/27/20213 a<p>We suggest a test of a central prediction of perturbatively quantized general relativity: the coherent communication of quantum information between massive objects through gravity. To do this, we introduce the concept of interactive quantum information sensing, a protocol tailored to the verification of dynamical entanglement generation between a pair of systems. Concretely, we propose to monitor the periodic wavefunction collapse and revival in an atomic interferometer which is gravitationally coupled to a mechanical oscillator. We prove a theorem which shows that, under the assumption of time-translation invariance, this collapse and revival is possible if and only if the gravitational interaction forms an entangling channel. Remarkably, as this approach improves at moderate temperatures and relies primarily upon atomic coherence, our numerical estimates indicate feasibility with current devices.</p>1 aCarney, Daniel1 aMüller, Holger1 aTaylor, Jacob, M.  uhttps://arxiv.org/abs/2101.11629