Hey everybody, I'm currently struggling to make sense of the infinite volume limit of a QFT. What I'm talking about is the (formal) limit of "quantization in a box with periodic boundary conditions" to "quantization in Minkowski space" as the side of the box goes to infinity. Does anyone know of an article or book where this approach is taken? Possibly where the actual formal limit is discussed. No just "And as we take the infinite volume limit we obtain the continuum representation of the operators." but possibly where the various replacements are discussed (sums -> integrals, discrete variables -> continuum variables and so on) more carefully? Thanks!