Certification of multi-qubit quantum systems with temporal inequalities

• DOI: 10.1088/1367-2630/ad86e5
• Publication Date: 2024-10-15T22:52:04Z
• Authors: Gautam Sharma; Chellasamy Jebara...; Sk Sazim; Remigiusz Augusiak
• Keywords: Quantum Physics; Science; Physics; QC1-999; Q; self-testing quantum systems; multi-qubits; FOS: Physical sciences; Quantum Physics (quant-ph); temporal inequality

Abstract Demonstrating contextual correlations in quantum theory through the violation of a non-contextuality inequality necessarily needs some ‘contexts’ and thus assumes compatibility relations between measurements. As result, any self-testing protocol based on maximal such is not free from assumptions. In this work, we propose temporal inequalities derived for multi-qubit systems without assuming among We demonstrate that new can be maximally violated via sequential measurement scenario. Moreover, using these inequalities, are able to certify Greenberger–Horne–Zeilinger (GHZ) states