We show that a recent proposal for the quantization of gravity based on discrete spacetime implies a modification of standard quantum mechanics that naturally leads to a loss of coherence in quantum states of the type discussed by Milburn. The proposal overcomes the energy conservation problem of previously proposed decoherence mechanisms stemming from quantum gravity. Mesoscopic quantum systems (as Bose-Einstein condensates) appear as the most promising testing grounds for an experimental verification of the mechanism.
Publication Source (Journal or Book title)
Classical and Quantum Gravity
Gambini, R., Porto, R., & Pullin, J. (2004). Loss of quantum coherence from discrete quantum gravity. Classical and Quantum Gravity, 21 (8) https://doi.org/10.1088/0264-9381/21/8/L01