- #1
sandy stone
- 231
- 148
I've been reading about the Dirac equation, and most authors eventually make some statement to the effect that the fact of spin and antiparticles falling out of the equation reflects a deep connection to the structure of spacetime. Is the implication that the math requires four particle states (or types, spin up/down, matter/antimatter) because there are four dimensions of spacetime? And that this tells us something important about the way the universe is constructed and is not just an artifact of the mathematics?