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http://hdl.handle.net/2289/7790
Title: | Device-independent bounds from Cabello’s nonlocality argument |
Authors: | Rai, Ashutosh Pivoluska, Matej Plesch, Martin Sasmal, Souradeep Banik, Manik Ghosh, Sibasish |
Issue Date: | Jun-2021 |
Publisher: | American Physical Society |
Citation: | Physical Review A, 2021, Vol.103, p062219 |
Abstract: | Hardy-type arguments manifest Bell nonlocality in one of the simplest possible ways. Except for demonstrating nonclassical signature of entangled states in question, they can also serve for device-independent self-testing of states, as shown, e.g., in Phys. Rev. Lett. 109, 180401 (2012). Here we develop and broaden these results to an extended version of Hardy's argument, often referred to as Cabello's nonlocality argument. We show that, as in the simpler case of Hardy's nonlocality argument, the maximum quantum value for Cabello's nonlocality is achieved by a pure two-qubit state and projective measurements that are unique up to local isometries. We also examine the properties of a more realistic case when small errors in the ideal constraints are accepted within the probabilities obtained and prove that also in this case the two-qubit state and measurements are sufficient for obtaining the maximum quantum violation of the classical bound. |
Description: | Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations) |
URI: | http://hdl.handle.net/2289/7790 |
ISSN: | 2469-9934 (online) 2469-9926 |
Alternative Location: | https://arxiv.org/abs/2103.09919 https://doi.org/10.1103/PhysRevA.103.062219 |
Copyright: | 2021 American Physical Society |
Appears in Collections: | Research Papers (LAMP) |
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2021_PhysRevA_Vol.103_p062219.pdf Restricted Access | Restricted Access | 285.55 kB | Adobe PDF | View/Open Request a copy |
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