# Two particles Dirac type equation question

• I
https://arxiv.org/pdf/0805.4725.pdf

It seems that the potential between the particles can be assumed of different forms, shouldn't the potential be a solution of the problem.
Thanks

PeterDonis
Mentor
shouldn't the potential be a solution of the problem.

No, it's an input to the problem. You assume a particular potential, then solve the equations to see what the possible states of the system are.

No, it's an input to the problem. You assume a particular potential, then solve the equations to see what the possible states of the system are.