Quantum diffusion as a process of linear quantum dynamics

TL;DR

This paper demonstrates that quantum diffusion, traditionally linked to measurement-induced state collapse, can be understood entirely within linear relativistic quantum mechanics, challenging the belief that measurement requires external postulates.

Contribution

It shows that quantum diffusion and measurement processes can be explained using only the principles of linear relativistic quantum mechanics, without additional assumptions.

Findings

Quantum diffusion can be derived from linear relativistic quantum mechanics.

Quantum measurement can be analyzed within standard quantum theory.

Challenges the view that measurement requires external postulates.

Abstract

Quantum diffusion, as developed in the 1990s, could explain how a system, subject to measurement, goes into an eigenstate of the measured observable. Here it is shown that quantum diffusion theory can be interpreted as a result within linear relativistic quantum mechanics. Thus, in contrast to what is widely believed, quantum measurement can be analyzed within the theory of quantum mechanics itself.