Comment on "Understanding the Frauchiger-Renner argument" by Jeffrey Bub

TL;DR

This paper critically examines Jeffrey Bub's claim about the Frauchiger-Renner argument, demonstrating that his assertion is incorrect and providing an alternative interpretation of the original argument.

Contribution

The paper refutes Bub's claim and offers a new perspective on the Frauchiger-Renner argument's assumptions and implications.

Findings

Bub's claim about the projection assumption is incorrect

An alternative understanding of the Frauchiger-Renner argument is proposed

Clarifies the role of state vector projection in quantum measurement

Abstract

Bub has recently claimed that the Frauchiger-Renner argument does not require an assumption that the state vector undergoes projection after measurement. It is shown that this claim is not true, and an alternative understanding of the argument is offered.