Part 5/8:
The development of a new force field becomes the lifeline for correcting this disruption in symmetry, leading us toward a groundbreaking realization.
The Birth of Quantum Electrodynamics
To restore symmetry, we find ourselves naturally led to introduce a new entity: the photon field. When we modify the Dirac equation to accommodate this photon field and perform the necessary calculations, we uncover what remains of our equation now embodying quantum electrodynamics (QED). This field is not just theoretical; it describes the electromagnetic force that informs our interactions with the universe.