Original Post

Lattice regularization. Operators are just continuous version of measurement tensors. Spacetime probability amplitudes of your favorite fields and the field directions, if these are vector fields, or more complex tensors of tensors, if these are fermions, or normal scalars, like Higgs. Fun what tensor products, contraction, and traces can do for you! And keep the mystery that Fourier transform can always flip it into the energy phase space representation! Even for spinors. 😎📚🤓