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Various models of quantum gravity imply the Planck-scale modifications ofHeisenberg's uncertainty principle into a so-called generalized uncertaintyprinciple (GUP). The GUP effects on high-energy physics, cosmology, andastrophysics have been extensively studied. Here, we focus on theweak-equivalence-principle (WEP) violation induced by the GUP. Results from theWEP test with the $^{85}$Rb-$^{87}$Rb dual-species atom interferometer are usedto set upper bounds on parameters in two GUP proposals. A $10^{45}$-level boundon the Kempf-Mangano-Mann proposal, and a $10^{27}$-level bound on Maggiore'sproposal, which are consistent with bounds from other experiments, areobtained. All these bounds have huge room for improvement in the future.

Constraining the generalized uncertainty principle with the atomic weak-equivalence-principle test