Correspondence: Enhancing a phase measurement by sequentially probing a solid state system
Quantum Physics
2016-06-08 v1
Abstract
In a recent paper, Liu et al. [Nat. Commun. 6:6726 (2015)] claim to perform the first room temperature entanglement-enhanced phase measurement in a solid-state system. We argue here that this claim is incorrect: their measurement is not enhanced because of the entanglement in their system, but instead the enhancement comes from the fact that the phase shift is applied twice to their state.
Cite
@article{arxiv.1604.06719,
title = {Correspondence: Enhancing a phase measurement by sequentially probing a solid state system},
author = {P. A. Knott and W. J. Munro and J. A. Dunningham},
journal= {arXiv preprint arXiv:1604.06719},
year = {2016}
}
Comments
2 pages