Self-testing of genuine multipartite non-local and non-maximally entangled states

• URL: http://arxiv.org/abs/2403.00010v3
• Date: Sat, 11 May 2024 06:21:03 GMT
• Title: Self-testing of genuine multipartite non-local and non-maximally entangled states
• Authors: Ranendu Adhikary,
• Abstract summary: We present a Cabello-like paradox for scenarios involving an arbitrary number of parties. This is a tool for detecting genuine multipartite nonlocality. We operate within the standard self-testing framework to self-test genuine multipartite non-local and non-maximally entangled states.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Self-testing enables the characterization of quantum systems with minimal assumptions on their internal working as such it represents the strongest form of certification for quantum systems. In the existing self-testing literature, self-testing states that are not maximally entangled, but exhibit genuine multipartite nonlocality, have remained an open problem. This is particularly important because, for many-body systems, genuine multipartite nonlocality has been recognized as the strongest form of multipartite quantum correlation. In this work, we present a Cabello-like paradox for scenarios involving an arbitrary number of parties. This paradox is a tool for detecting genuine multipartite nonlocality, allowing for the specific identification and self-testing of states that defy the paradox's limits the most, which turn out to be non-maximally multipartite entangled states. While recent results [\textit{\v{S}upi\'c et al., Nature Physics, 2023}] suggest network self-testing as a means to self-test all quantum states, here we operate within the standard self-testing framework to self-test genuine multipartite non-local and non-maximally entangled states.

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