The resulting spectra can be used to study precision physics. Depending on the values of g and m 2 , the above ϕ ϕ 4 theory can be in a symmetry-preserving or a symmetry-broken phase, which can be studied explicitly using the above algorithm. The continuous phase transition between these two phases can also be analyzed, in which case the spectrum and eigenstates of H contain information about the conformal field theory of the Ising universality class.