- #1
Bobhawke
- 144
- 0
For scalar fields the propagator is just a number that represents the amplitude for a particle to go from one space time point to another.
For fermions, the propagator is matrix valued. What then is the amplitude for a fermion to go from one point to another? How are the elements of the matrix to be interpreted in terms of probability ampltudes?
For fermions, the propagator is matrix valued. What then is the amplitude for a fermion to go from one point to another? How are the elements of the matrix to be interpreted in terms of probability ampltudes?