- #1
Milsomonk
- 96
- 17
Hey guys,
Hope all is well. I'm trying to get my head round some of the Quantum Mechanics of spin. I fully understand why the Pauli equation acts on a two component spinor wavefunction, where I'm a little confused is why the Dirac equation then acts on a 4 component spinor wavefunction. I get that it is in a sense four coupled equations but why is spin implied? I've done a fair bit of reading in the griffiths book but any extra insight would be very much appreciated.
Hope all is well. I'm trying to get my head round some of the Quantum Mechanics of spin. I fully understand why the Pauli equation acts on a two component spinor wavefunction, where I'm a little confused is why the Dirac equation then acts on a 4 component spinor wavefunction. I get that it is in a sense four coupled equations but why is spin implied? I've done a fair bit of reading in the griffiths book but any extra insight would be very much appreciated.