Defending Quantum Objectivity

TL;DR

This paper critically examines Masanes' argument against the objectivity of quantum measurement outcomes, revealing its limited applicability and defending the notion of quantum objectivity.

Contribution

It clarifies the scope of Masanes' argument and shows it does not undermine the objectivity of quantum measurements in most hidden-variable models.

Findings

The argument applies only to specific hidden-variable models.

Most hidden-variable models, including pilot-wave theory, are unaffected.

The claim that quantum measurements lack objectivity is not supported by the analysis.

Abstract

A recent argument, attributed to Masanes, is claimed to show that the assumption that quantum measurements have definite, objective outcomes, is incompatible with quantum predictions. In this work, a detailed examination of the argument shows that it has a much narrower field of application than previously recognized. In particular, it is found: i) that the argument only applies to hidden-variable models with a particular feature; and ii) that such a feature is not present in most hidden-variable models, including pilot-wave theory. It is concluded that the argument does not succeed in calling into question the objectivity of quantum measurements.