@inproceedings{c77cb69221eb4467bdeeea18148acf62,
title = "Entanglement-free, heisenberg-limited phase measurement",
abstract = "We demonstrate the first experimental Heisenberg-limited scaling of the phase variance in optical phase measurements. Our algorithm replaces complicated entangled states - widely thought to be essential for Heisenberg scaling - with single photons, multiple passes through a phase shift, and adaptive measurement. We show that although a single-photon version of Kitaev's phase estimation algorithm has standard-quantum-limited variance, our generalized technique is within a small constant factor of the ultimate quantum limit.",
author = "Higgins, {B. L.} and Wiseman, {H. M.} and Pryde, {G. J.} and Berry, {D. W.} and Bartlett, {S. D.}",
year = "2007",
language = "English",
series = "Optics InfoBase Conference Paper Series",
publisher = "Optical Society of America (OSA)",
pages = "1--1",
booktitle = "Proceedings of Quantum-Atom Optics Downunder 2007",
address = "United States",
note = "Quantum-Atom Optics Downunder 2007, QAO 2007 ; Conference date: 03-12-2007 Through 03-12-2007",
}