Comment on "Continuous quantum measurement: inelastic tunneling and lack of current oscillations"

TL;DR

This paper critiques a previous study by demonstrating that its main conclusion about the absence of spectral peaks in continuous weak measurement of qubits is incorrect, challenging prior assumptions in quantum measurement theory.

Contribution

It provides a counter-argument to the claim that spectral peaks are absent in continuous weak measurements of qubits, correcting a misconception in the field.

Findings

The main result of the criticized paper is incorrect.

Spectral peaks do appear in continuous weak measurements of qubits.

The critique clarifies the conditions under which spectral peaks are observed.

Abstract

This is a comment on recent paper by T.M. Stace and S.D. Barrett, PRL 92, 136802 (2004). We show that the main result of the paper, absence of the spectral peak for continuous weak measurement of coherent oscillations in a qubit, is incorrect.