Abstract
The experimental observation of a clear quantum signature of gravity is believed to be out of the grasp of current technology. However, several recent promising proposals to test the possible existence of non-classical features of gravity seem to be accessible by the state-of-art table-top experiments. Among them, some aim at measuring the gravitationally induced entanglement between two masses which would be a distinct non-classical signature of gravity. We explicitly study, in two of these proposals, the effects of decoherence on the system’s dynamics by monitoring the corresponding degree of entanglement. We identify the required experimental conditions necessary to perform successfully the experiments. In parallel, we account also for the possible effects of the continuous spontaneous localization (CSL) model, which is the most known among the models of spontaneous wavefunction collapse. We find that any value of the parameters of the CSL model would completely hinder the generation of gravitationally induced entanglement.
Highlights
Testing the quantumness of gravity represents an outstanding challenge that has been approached from different perspectives [1]
By building on the first analysis performed in [51, 52] for the setup of Bose et al, we study the decoherence effects on the entanglement allegedly induced by non-classical gravity and identify the experimental conditions required to perform successfully the BM [10, 11] and Krisnanda et al [12] proposals
We have found an analytic expression for the entanglement when decoherence is explicitly considered in the dynamics of the system
Summary
Simone Rijavec1,∗ , Matteo Carlesso2,3 , Angelo Bassi2,3 , Vlatko Vedral and Chiara Marletto.
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