Related papers: Detection of mode-intrinsic quantum entanglement

Detection of mode-intrinsic quantum entanglement

URL: http://arxiv.org/abs/2407.18095v1
Date: Thu, 25 Jul 2024 15:01:47 GMT
Title: Detection of mode-intrinsic quantum entanglement
Authors: Carlos E. Lopetegui, Mathieu Isoard, Nicolas Treps, Mattia Walschaers,
Abstract summary: We propose a witness to detect a strong form of entanglement that only non-Gaussian states possess. The strength of our witness is two-fold: it only requires measurements in one basis to check entanglement in any arbitrary mode basis.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: Quantum correlations are at the core of the power of quantum information and are necessary to reach a quantum computational advantage. In the context of continuous-variable quantum systems, another necessary ressource for quantum advantages is non-Gaussianity. In this work, we propose a witness, based on previously known relations between metrological power and quantum correlations, to detect a strong form of entanglement that only non-Gaussian states possess and that cannot be undone by passive optical operations, i.e., entanglement in all mode bases. The strength of our witness is two-fold: it only requires measurements in one basis to check entanglement in any arbitrary mode basis; it can be made applicable experimentally using homodyne measurements and without requiring a full tomography of the state.

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