Abstract
Several quantum gravity scenarios lead to physics below the Planck scale characterized by nonlocal, Lorentz invariant equations of motion. We show that such nonlocal effective field theories lead to a modified Schrödinger evolution in the nonrelativistic limit. In particular, the nonlocal evolution of optomechanical quantum oscillators is characterized by a spontaneous periodic squeezing that cannot be generated by environmental effects. We discuss constraints on the nonlocality obtained by past experiments, and show how future experiments (already under construction) will either see such effects or otherwise cast severe bounds on the nonlocality scale (well beyond the current limits set by the Large Hadron Collider). This paves the way for table top, high precision experiments on massive quantum objects as a promising new avenue for testing some quantum gravity phenomenology.
Original language  English 

Article number  161303 
Journal  Physical Review Letters 
Volume  116 
DOIs  
Publication status  Published  21 Apr 2016 
Keywords
 Optomechanics
 Quantum gravity
 spacetime discreteness
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Profiles

Alessio Belenchia
 School of Mathematics and Physics  Visiting Scholar
 Centre for Theoretical Atomic, Molecular and Optical Physics (CTAMOP)
Person: Research