Emergence of the wavefunction of a non-relativistic quantum particle from QFT

Abstract: The nonrelativistic wavefunction of a quantum state that contains all its information is derived directly from the effective quantum fields of the standard model of particle physics, which are the fundamental elements of reality of the universe unveiled to us so far. Consequently, the endless debate about the reality of a wavefunction can now be reasonably put to rest and nonrelativistic quantum mechanics can cogently be considered as a genuine theory.