Loss-resistant unambiguous phase measurement

Hossein T. Dinani, Dominic W. Berry

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Entangled multiphoton states have the potential to provide improved measurement accuracy, but are sensitive to photon loss. It is possible to calculate ideal loss-resistant states that maximize the Fisher information, but it is unclear how these could be experimentally generated. Here we propose a set of states that can be obtained by processing the output from parametric down-conversion. Although these states are not optimal, they provide performance very close to that of optimal states for a range of parameters. Moreover, we show how to use sequences of such states in order to obtain an unambiguous phase measurement that beats the standard quantum limit. We consider the optimization of parameters in order to minimize the final phase variance, and find that the optimum parameters are different from those that maximize the Fisher information.

LanguageEnglish
Article number023856
Pages1-8
Number of pages8
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume90
Issue number2
DOIs
Publication statusPublished - 28 Aug 2014

Fingerprint

Fisher information
synchronism
optimization
output
photons

Cite this

@article{e5543f5b58154fd2b1bd8c9f3ff91be8,
title = "Loss-resistant unambiguous phase measurement",
abstract = "Entangled multiphoton states have the potential to provide improved measurement accuracy, but are sensitive to photon loss. It is possible to calculate ideal loss-resistant states that maximize the Fisher information, but it is unclear how these could be experimentally generated. Here we propose a set of states that can be obtained by processing the output from parametric down-conversion. Although these states are not optimal, they provide performance very close to that of optimal states for a range of parameters. Moreover, we show how to use sequences of such states in order to obtain an unambiguous phase measurement that beats the standard quantum limit. We consider the optimization of parameters in order to minimize the final phase variance, and find that the optimum parameters are different from those that maximize the Fisher information.",
author = "Dinani, {Hossein T.} and Berry, {Dominic W.}",
year = "2014",
month = "8",
day = "28",
doi = "10.1103/PhysRevA.90.023856",
language = "English",
volume = "90",
pages = "1--8",
journal = "Physical Review A: covering atomic, molecular, and optical physics and quantum information",
issn = "2469-9926",
publisher = "American Physical Society",
number = "2",

}

Loss-resistant unambiguous phase measurement. / Dinani, Hossein T.; Berry, Dominic W.

In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 90, No. 2, 023856, 28.08.2014, p. 1-8.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Loss-resistant unambiguous phase measurement

AU - Dinani, Hossein T.

AU - Berry, Dominic W.

PY - 2014/8/28

Y1 - 2014/8/28

N2 - Entangled multiphoton states have the potential to provide improved measurement accuracy, but are sensitive to photon loss. It is possible to calculate ideal loss-resistant states that maximize the Fisher information, but it is unclear how these could be experimentally generated. Here we propose a set of states that can be obtained by processing the output from parametric down-conversion. Although these states are not optimal, they provide performance very close to that of optimal states for a range of parameters. Moreover, we show how to use sequences of such states in order to obtain an unambiguous phase measurement that beats the standard quantum limit. We consider the optimization of parameters in order to minimize the final phase variance, and find that the optimum parameters are different from those that maximize the Fisher information.

AB - Entangled multiphoton states have the potential to provide improved measurement accuracy, but are sensitive to photon loss. It is possible to calculate ideal loss-resistant states that maximize the Fisher information, but it is unclear how these could be experimentally generated. Here we propose a set of states that can be obtained by processing the output from parametric down-conversion. Although these states are not optimal, they provide performance very close to that of optimal states for a range of parameters. Moreover, we show how to use sequences of such states in order to obtain an unambiguous phase measurement that beats the standard quantum limit. We consider the optimization of parameters in order to minimize the final phase variance, and find that the optimum parameters are different from those that maximize the Fisher information.

UR - http://www.scopus.com/inward/record.url?scp=84906963494&partnerID=8YFLogxK

U2 - 10.1103/PhysRevA.90.023856

DO - 10.1103/PhysRevA.90.023856

M3 - Article

VL - 90

SP - 1

EP - 8

JO - Physical Review A: covering atomic, molecular, and optical physics and quantum information

T2 - Physical Review A: covering atomic, molecular, and optical physics and quantum information

JF - Physical Review A: covering atomic, molecular, and optical physics and quantum information

SN - 2469-9926

IS - 2

M1 - 023856

ER -