Self-testing quantum states via nonmaximal violation in Hardy's test of nonlocality
| Autor: | Ashutosh Rai, Matej Pivoluska, Souradeep Sasmal, Manik Banik, Sibasish Ghosh, Martin Plesch |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Physical Review A. 105 |
| ISSN: | 2469-9934 2469-9926 |
| Popis: | Self-testing protocols enable certification of quantum devices without demanding full knowledge about their inner workings. A typical approach in designing such protocols is based on observing nonlocal correlations which exhibit maximum violation in a Bell test. We show that in Bell experiment known as Hardy's test of nonlocality not only the maximally nonlocal correlation self-tests a quantum state, rather a non-maximal nonlocal behavior can serve the same purpose. We, in fact, completely characterize all such behaviors leading to self-test of every pure two qubit entangled state except the maximally entangled ones. Apart from originating a novel self-testing protocol, our method provides a powerful tool towards characterizing the complex boundary of the set of quantum correlations. Comment: Title modified, closer to the published version (9 pages + 6 figures) |
| Databáze: | OpenAIRE |
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