Improving quantum phase estimation via power-law potential systems

Using the quantum Fisher information (QFI), we present an improved phase estimation scheme employing power-law potential (PLP) systems in comparison to NOON states under perfect and lossy conditions for a fixed mean photon number. The study is devoted to the phase estimation of the quantum states re...

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Bibliographic Details
Published inLaser physics Vol. 24; no. 6; pp. 65201 - 65205
Main Author Berrada, K
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.06.2014
Subjects
fisher information
parity measurement
photon losses
power-law potentials
quantum metrology
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Summary:Using the quantum Fisher information (QFI), we present an improved phase estimation scheme employing power-law potential (PLP) systems in comparison to NOON states under perfect and lossy conditions for a fixed mean photon number. The study is devoted to the phase estimation of the quantum states resulting from tightly binding, harmonic and loosely binding potentials for modest particle numbers. Finally, we discuss the saturation of the optimal phase uncertainty of this interferometric setting with parity detection.
ISSN:1054-660X
1555-6611
DOI:10.1088/1054-660X/24/6/065201