2025/08/08 by Giovanni Amelino-Camelia, Giuseppe Fabiano, Amelino-Camelia, Giovanni +5
Physics and Astronomy · #Atomic Physics (physics.atom-ph) #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Dispersion (optics) #Dispersion relation #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Theory (hep-th) #Interferometry #Length scale #Measure (data warehouse) #Mixing (physics) #Quantum optics and atomic interactions #Scale (ratio) #Term (time)
paper · pdf · doi:10.48550/arxiv.2508.06171
published in arXiv (Cornell University) (Cornell University)
openalex publication_date 2025/08/08 · openalex created_date 2025/10/15 · openalex updated_date 2026/08/05
IR/UV mixing (a mechanism causing ultraviolet quantum-gravity effects to manifest themselves also in a far-infrared regime) is a rare case of feature found in several approaches to the quantum-gravity problem. We here derive the implications for "soft" IR/UV mixing (corrections to the dispersion relation that are linear in momentum) of some recent cold-atom-interferometry measurements. For both signs of the IR/UV-mixing correction term we establish bounds on the characteristic length scale which reach the Planck-length milestone. Intriguingly, for values of the characteristic scale of about half the Planck length we find that IR/UV mixing provides a solution for a puzzling discrepancy between Cesium-based and Rubidium-based atom-interferometric measurements of the fine structure constant.