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This https://arxiv.org/abs/2307.06710 has been replaced.
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Certification of two-qubit quantum systems with temporal inequality
Self-testing of quantum devices based on observed measurement statistics is a method to certify quantum systems using minimal resources. In Ref. [Phys. Rev. \textbf{A} 101, 032106 (2020)], a scheme based on observing measurement statistics that demonstrate Kochen-Specker contextuality has been shown to certify two-qubit entangled states and measurements without the requirement of spatial separation between the subsystems. However, this scheme assumes a set of compatibility conditions on the mea…

The user is inquiring on the difficulty of obtaining a Certified Ethical Hacker (CEH) certification by October, having already achieved Sec and asking for recommended learning resources. https://reddit.com/r/cybersecurity/comments/1bnfkwn/