Tests of Quantum Gravity-Induced Non-Locality via Opto-mechanical   Experiments
  The nonrelativistic limit of nonlocal modifications to the Klein Gordon operator is studied, and the experimental possibilities of casting stringent constraints on the nonlocality scale via planned and/or current optomechanical experiments are discussed. Details of the perturbative analysis and semianalitical simulations leading to the dynamical evolution of a quantum harmonic oscillator in the presence of non locality reported in [1], together with a comprehensive account of the experimental methodology with particular regard to sensitivity limitations related to thermal decoherence time and active cooling of the oscillator, are given. Finally, a strategy for detecting non-locality scales of the order of $10^{- 22} \div 10^{- 26}$ m by means of the spontaneous time periodic squeezing of quantum coherent states is provided. 
Alessio Belenchia, Dionigi M. T. Benincasa, Stefano Liberati,   Francesco Marin, Francesco Marino, Antonello Ortolan
gr-qc hep-th quant-ph