Particle vs. Mode Entanglement in Optical Quantum Metrology

Nicolas Quesada; Jaspreet Sahota

doi:10.1364/CLEO_QELS.2015.FM1A.3

CLEO: 2015
OSA Technical Digest (online) (Optica Publishing Group, 2015),
paper FM1A.3
•https://doi.org/10.1364/CLEO_QELS.2015.FM1A.3

Particle vs. Mode Entanglement in Optical Quantum Metrology

Nicolás Quesada and Jaspreet Sahota

CLEO: QELS_Fundamental Science 2015

San Jose, California United States
10–15 May 2015
ISBN: 978-1-55752-968-8

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Quantum Metrology and Measurement (FM1A)

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N. Quesada and J. Sahota, "Particle vs. Mode Entanglement in Optical Quantum Metrology," in CLEO: 2015, OSA Technical Digest (online) (Optica Publishing Group, 2015), paper FM1A.3.

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Abstract

We present a constructive proof of the fact that mode entanglement is not necessary for optical quantum enhanced metrology (QEM) but particle entanglement is. We provide a particle entanglement witness that detects all path symmetric states useful for QEM in a Mach-Zender interferometer.

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