Entanglement dynamics in QED processes

We reformulate the phenomenon of maximal entanglement conservation in Quantum Electrodynamics (QED) scattering processes, previously discussed in earlier works, using the tools of quantum maps and invariant sets. These sets are characterized as hypersurfaces within the six-dimensional parameter space. Furthermore, we speculate over a possible irreversible (ever-increasing) behavior of entanglement in QED scatterings. • Complete transfer of maximal entanglement in Bhabha scattering. • QED scattering processes preserve maximal entanglement for fermionic systems. • We present the invariant sets representing the conserved maximally entangled states. • Preliminary studies suggest a global rise in entanglement in QED interactions. • Future work will address mixed states and all particle d.o.f.