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Pré-Publication, Document De Travail Année : 2023

Metrological detection of purely-non-Gaussian entanglement

Résumé

Entanglement and non-Gaussianity are physical resources essential for a large number of quantum-optics protocols. Non-Gaussian entanglement is indispensable for quantum-computing advantage and outperforms its Gaussian counterparts in a number of quantum-information protocols. The characterization of non-Gaussian entanglement is a critical matter as it is in general highly demanding in terms of resources. We propose a simple protocol based on the Fisher information for witnessing entanglement in an important class of non-Gaussian entangled states: photon-subtracted states. We demonstrate that our protocol is relevant for the detection of purely-non-Gaussian entanglement and that it is experimentally feasible through homodyne detection.

Dates et versions

hal-03958502 , version 1 (26-01-2023)

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David Barral, Mathieu Isoard, Giacomo Sorelli, Manuel Gessner, Nicolas Treps, et al.. Metrological detection of purely-non-Gaussian entanglement. 2023. ⟨hal-03958502⟩
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