I was reading about the Klein Gordon equation of scalar fields. I notice that the hamiltonian is not Hermitian:
∂0(Φ,π)T = matrix((0,1),(-p2,0)) (Φ,π)T
The Hamiltonian operator iH = matrix((0,1),(-p2,0)) is not a hermitian matrix.
What does this mean? Does this mean Klein Gordon fields don't...