Quantum Gravity Phenomenology: Insights and Advances

Dear Colleagues,

The quantization of gravity remains one of physics’ great challenges, with competing models predicting subtle deviations from classical relativity at the Planck scale. These effects may be detectable through various astrophysical observations—time delays in gamma-ray bursts, spectral anomalies in high-energy photons and cosmic rays, deviations in neutrino oscillations, and modifications to gravitational wave propagation—all potential signatures of quantum spacetime.

Complementing these cosmic probes, laboratory experiments are achieving unprecedented sensitivity through optomechanical systems and high-precision interferometry. These investigations increasingly intersect with quantum information science, probing decoherence patterns, modified uncertainty relations, and nonlocal effects that may stem from spacetime discreteness or deformed symmetries. Tabletop quantum tests—particularly entanglement-based protocols and macroscopic superposition experiments—now offer viable pathways to explore Planck-scale phenomenology.

This Special Issue welcomes original research and review articles on quantum gravity phenomenology across all scales, from astrophysical tests using cosmic messengers to laboratory and accelerator-based searches.

Dr. Iarley P. Lobo
Guest Editor

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