Light-cone Hamiltonian
= Light-cone Hamiltonian
{title2=$H=(p_i^2+\mu^2)/(2p^+)$}
With $ds^2=-2dx^+dx^-+dx_i^2$, $x^+=t$, and $p_-\ne0$, the <mass-shell condition> gives $H=-p_+=-(p_i^2+\mu^2)/(2p_-)$. In the future-directed sector $p^+=-p_->0$, this is $(p_i^2+\mu^2)/(2p^+)$. Its <Schrodinger equation> is equivalent to the <Klein-Gordon equation> after multiplication by $2p_-$.