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oai:docta.ucm.es:20.500.14352/80972023-08-27T17:29:02Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc Leuchs, Gerd author Hawton, Margaret author Sánchez Soto, Luis Lorenzo author 2020-01-18 We present a new perspective on the link between quantum electrodynamics (QED) and Maxwell’s equations. We demonstrate that the interpretation of the electric displacement vector D=ε0E , where E is the electric field vector and ε0 is the permittivity of the vacuum, as vacuum polarization is consistent with QED. A free electromagnetic field polarizes the vacuum, but the polarization and magnetization currents cancel giving zero source current. The speed of light is a universal constant, while the fine structure constant, which couples the electromagnetic field to matter runs, as it should. 2624-8174 10.3390/physics2010002 https://hdl.handle.net/20.500.14352/8097 https://doi.org/10.3390/physics2010002 https://www.mdpi.com/2624-8174/2/1/2 QED Response of the Vacuum