On the novelty, efficacy, and significance of weak measurements for quantum tomography

TL;DR

This paper critically evaluates claims about weak measurements in quantum tomography, finding that they are not essential for many purported benefits, thus questioning their claimed novelty and efficacy.

Contribution

The paper provides a critical analysis showing that weak measurements are not necessary for many advantages claimed in quantum tomography proposals.

Findings

Weak measurements are not essential for most claimed benefits in quantum tomography.

Claims of novelty and efficacy of weak measurements are often overstated.

The paper clarifies the foundational significance of weak measurements in this context.

Abstract

The use of weak measurements for performing quantum tomography is enjoying increased attention due to several recent proposals. The advertised merits of using weak measurements in this context are varied, but are generally represented by novelty, increased efficacy, and foundational significance. We critically evaluate two proposals that make such claims and find that weak measurements are not an essential ingredient for most of their advertised features.