- 21

- 2

- Summary
- Matter and EM represented as independent, coupled fields in QED, yet EM emerges via local phase changes in the matter field to establish gauge symmetry - so is EM really an independent field?

It seems that QED treats the matter and EM fields as independent yet coupled fields. On the other hand the EM field equations emerge immediately under local change of the phase of the matter field, exactly as required to reestablish local (gauge) invariance. From that perspective it almost seems as if there is a single field (matter/EM), presenting in different ways as its phase may be locally changed - would appreciate any thoughts on the topic.