Scalar propagator
= Scalar propagator
{title2=$\Delta_E(p)$}
For a free massive scalar in a <Euclidean path integral>, inversion of the quadratic kernel gives $\Delta_E(p)=1/(p^2+m^2)$. The Minkowski version follows by <Wick rotation>.
= Scalar propagator
{title2=$\Delta_E(p)$}
For a free massive scalar in a <Euclidean path integral>, inversion of the quadratic kernel gives $\Delta_E(p)=1/(p^2+m^2)$. The Minkowski version follows by <Wick rotation>.