Question

Deriving massless point particle action from Maxwell action?

Answer 1

 The Maxwell action and the action for a massless point particle are written in very different language (field values integrated over spacetime vs. particle trajectory integrated over time). But if I want to follow, say, the front of an EM wave, I should be able to get the massless point particle action from Maxwell. Does anyone know if this can be done and if so where?

Answer 2

Explanation:

interactive system of point charges and the electromagnetic field. with Maxwell equations. The most radical ... This is an action-at-a-distance theory where particles interact a