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

TL;DR

This paper derives the nonrelativistic wavefunction directly from quantum field theory, providing a fundamental basis for quantum mechanics and addressing debates about its reality.

Contribution

It establishes a direct derivation of the wavefunction from quantum fields, linking nonrelativistic quantum mechanics to fundamental quantum field theory.

Findings

Wavefunction derived from quantum fields

Supports the reality of the wavefunction

Bridges quantum mechanics and quantum field theory

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.