Metrological detection of entanglement generated by non-Gaussian operations
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866916092846276608 |
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| author | Barral, David Isoard, Mathieu Sorelli, Giacomo Gessner, Manuel Treps, Nicolas Walschaers, Mattia |
| author_facet | Barral, David Isoard, Mathieu Sorelli, Giacomo Gessner, Manuel Treps, Nicolas Walschaers, Mattia |
| contents | Entanglement and non-Gaussianity are physical resources that are 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 non-Gaussian entanglement generated by multiple photon-subtraction and that it is experimentally feasible through homodyne detection. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2301_03909 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Metrological detection of entanglement generated by non-Gaussian operations Barral, David Isoard, Mathieu Sorelli, Giacomo Gessner, Manuel Treps, Nicolas Walschaers, Mattia Quantum Physics Optics Entanglement and non-Gaussianity are physical resources that are 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 non-Gaussian entanglement generated by multiple photon-subtraction and that it is experimentally feasible through homodyne detection. |
| title | Metrological detection of entanglement generated by non-Gaussian operations |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2301.03909 |