A brief overview and some comments on the weak measurement protocol

TL;DR

This paper provides an overview of the weak measurement protocol, discusses its conceptual foundations, and comments on the nature of weak values and observable values between measurements.

Contribution

It offers a concise summary of weak measurement development and addresses conceptual issues related to weak values and measurement outcomes.

Findings

Weak measurement protocol has evolved significantly.

Weak values can sometimes lie outside the spectrum of observables.

Discussion on the reality and interpretation of weak values.

Abstract

The main purpose of this short article is to give a brief overview of the development of the very interesting weak measurement protocol. I add some comments relating to the reality of weak values, and also comment on the allowed values of observables between measurements.