Froewis, Florian and Fadel, Matteo and Treutlein, Philipp and Gisin, Nicolas and Brunner, Nicolas. (2019) Does large quantum Fisher information imply Bell correlations? Physical Review A, 99 (4). 040101.
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Official URL: https://edoc.unibas.ch/73823/
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Abstract
The quantum Fisher information (QFI) of certain multipartite entangled quantum states is larger than what is reachable by separable states, providing a metrological advantage. Are these nonclassical correlations strong enough to potentially violate a Bell inequality? Here, we present evidence from two examples. First, we discuss a Bell inequality designed for spin-squeezed states which is violated only by quantum states with a large QFI. Second, we relax a well-known lower bound on the QFI to find the Mermin Bell inequality as a special case. However, a fully general link between QFI and Bell correlations is still open.
| Faculties and Departments: | 05 Faculty of Science > Departement Physik > Physik > Experimentelle Nanophysik (Treutlein) |
|---|---|
| UniBasel Contributors: | Treutlein, Philipp and Fadel, Matteo |
| Item Type: | Article, refereed |
| Article Subtype: | Research Article |
| Publisher: | American Physical Society |
| ISSN: | 2469-9926 |
| e-ISSN: | 2469-9934 |
| Note: | Publication type according to Uni Basel Research Database: Journal article -- Additional publication or translation in: http://arxiv.org/abs/1810.01330 |
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| Last Modified: | 16 Apr 2020 07:55 |
| Deposited On: | 16 Apr 2020 07:55 |
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