Critique of "No-Signaling Condition and Quantum Dynamics"

TL;DR

This paper critiques a prior argument that linearity in quantum mechanics stems solely from the no-signaling principle and measurement assumptions, suggesting these are insufficient explanations.

Contribution

It challenges the sufficiency of common assumptions like no-signaling and measurement hypotheses in explaining quantum linearity.

Findings

Argues assumptions are ineffective in explaining quantum linearity

Highlights limitations of prior no-signaling-based explanations

Questions the foundational basis of quantum dynamics

Abstract

We comment on the article of Ch. Simon, V. Buzek and N. Gisin: ``No-Signaling Condition and Quantum Dynamics'', Phys. Rev. Lett. 87 (2001) 170405, which argues that linearity of quantum mechanics follows from lack of superluminal signals and some usual hypotheses about measurements. We argue that such assumptions in the end are ineffective as an explanation of the linearity of quantum mechanics.