Question

How to prove that identical particles are attracted or repelled in a given spin-s interaction theory?

Answer 1

I am trying to understand with a deeper foundation the attraction (N-S) or repel (N-N, SS) between two magnets. 

I have tried to reason with Lorentz forces pulling or pushing the electrons spins, but the resulting forces does not coincide with the direction of attraction-repel.

Answer 2

Holla ^_^


☸ Required Answer is ⬇⬇ ⬇⬇ ⬇



⭕ This is happens because is that to estimate interaction energy which says if same charges attract or repel, you use propagators. Propagators come from the expression of Lagrangians. Finally, the time derivative part for dynamical freedom degrees in the action must be positive, and this has a consequence on the sign of the Lagrangian.



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