2025/08/19 by Gamboa, J.
#FOS: Physical sciences #General Physics (physics.gen-ph)
paper · doi:10.48550/arxiv.2508.14928
We revisit infrared Quantum Electrodynamics (QED) by reformulating the dressing of charged states in terms of a functional Berry connection. In this framework, the electron--photon cloud acquires a topological character, leading to a modification of the Rayleigh-Jeans limit of blackbody radiation. The deviation is controlled by a dimensionless parameter ε, estimated as ε≃ (1.7--2.3)× 10-3 in the 80-110~GHz range, corresponding to a fractional shift of ∼ 0.2%. This effect lies within the sensitivity of current high-precision radiometry and, being system-independent, should be observable both in laboratory blackbody spectra and in the cosmic microwave background.