Quantum Field Theory and the Measurement Problem in Quantum Mechanics

TL;DR

This paper introduces a new approach to the quantum measurement problem using quantum field theory, suggesting that non-unitary evolution during elementary interactions causes stochastic outcome selection.

Contribution

It presents a novel solution to the measurement problem by combining quantum field theory with Haag's theorem, highlighting non-unitary evolution in elementary interactions.

Findings

Elementary interactions cause non-unitary evolution.

Interactions lead to stochastic outcome selection.

Outcome subspaces can be superpositions of various states.

Abstract

We propose a novel solution to the measurement problem based on quantum field theory and Haag's theorem. According to our proposal in elementary interactions where the particles content is changed, the temporal evolution is non unitary. These interactions which are almost instantaneous lead to a genuine stochastic selection of an outcome subspace that has a distinct particles content but can be a superposition of momentum states, spin states, etc.