Strategies for choosing path-entangled number states for optimal robust quantum optical metrology in the presence of loss

To acquire the best path-entangled photon Fock states for robust quantum optical metrology with parity detection, we calculate phase information from a lossy interferometer by using twin entangled Fock states. We show that (a) when loss is less than 50% twin entangled Fock states with large photon n...

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Bibliographic Details
Published in:arXiv.org 2012-04
Main Authors: Jiang, Kebei, Brignac, Chase J, Weng, Yi, Kim, Moochan B, Hwang, Lee, Dowling, Jonathan P
Format: Article
Language:English
Subjects:
Metrology
Noise sensitivity
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Summary:To acquire the best path-entangled photon Fock states for robust quantum optical metrology with parity detection, we calculate phase information from a lossy interferometer by using twin entangled Fock states. We show that (a) when loss is less than 50% twin entangled Fock states with large photon number difference give higher visibility while when loss is higher than 50% the ones with less photon number difference give higher visibility; (b) twin entangled Fock states with large photon number difference give sub-shot-noise limit sensitivity for phase detection in a lossy environment. This result provides a reference on what particular path-entangled Fock states are useful for real world metrology applications.
ISSN:2331-8422
DOI:10.48550/arxiv.1204.4851