Detecting Nonbilocal Correlations via Parameterized Elegant Joint Measurement

arXiv:2611.07769v1 Announce Type: new Abstract: Quantum networks constitute a defining resource for quantum information processing; however, their nonclassical behavior is jointly governed by the choice of measurement basis and the independence of the distributed sources. We study a bilocal entanglement-swapping network in which the central node performs a three-parameter elegant joint measurement (EJM). For two independent Bell-state sources, we construct two binary edge observables and then derive a quantum prediction involving three parameters, which surpasses the classical constraints. In particular, the parameter {\theta} controls both the degree of entanglement of the EJM basis states and the maximum value of the quantum prediction.