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- W3100973418 abstract "In quantum information, lifting is a systematic procedure that can be used to derive---when provided with a seed Bell inequality---other Bell inequalities applicable in more complicated Bell scenarios. It is known that the procedure of lifting introduced by Pironio [J. Math. Phys. A 46, 062112 (2005)] preserves the facet-defining property of a Bell inequality. Lifted Bell inequalities therefore represent a broad class of Bell inequalities that can be found in {em all} Bell scenarios. Here, we show that the maximal value of {em any} lifted Bell inequality is preserved for both the set of nonsignaling correlations and quantum correlations. Despite the degeneracy in the maximizers of such inequalities, we show that the ability to self-test a quantum state is preserved under these lifting operations. In addition, except for outcome-lifting, local measurements that are self-testable using the original Bell inequality---despite the degeneracy---can also be self-tested using {em any} lifted Bell inequality derived therefrom. While it is not possible to self-test {em all} the positive-operator-valued measure elements using an outcome-lifted Bell inequality, we show that partial, but robust self-testing statements on the underlying measurements can nonetheless be made from the quantum violation of these lifted inequalities. We also highlight the implication of our observations on the usefulness of using lifted Bell-like inequalities as a device-independent witnesses for entanglement depth. The impact of the aforementioned degeneracy on the geometry of the quantum set of correlations is briefly discussed." @default.
- W3100973418 created "2020-11-23" @default.
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- W3100973418 date "2019-11-04" @default.
- W3100973418 modified "2023-10-16" @default.
- W3100973418 title "Maximal violation of a broad class of Bell inequalities and its implication on self-testing" @default.
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- W3100973418 doi "https://doi.org/10.1103/physrevresearch.1.033073" @default.
- W3100973418 hasPublicationYear "2019" @default.
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