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QI: Fachverband Quanteninformation
QI 15: Quantum Information: Concepts and Methods II
QI 15.5: Talk
Thursday, March 12, 2026, 10:30–10:45, BEY/0137
Remote quantum certification from prepare-measure correlations: theory and experiment — •Albert Rico1, Javier Fernandez2, Anna Sanpera2, Some Sankar2, and Adam Valles2 — 1University of Siegen — 2Universitat Autonoma de Barcelona
For the practical implementation of quantum protocols, it is essencial to verify the presence of quantumness from classically observable data, under realistic assumptions. In a recent work, we demonstrated how this can be done in theory and experiment from the correlations between the inputs and outputs of a prepare-measure quantum setup, under the assumption that our quantum devices are limited in operational dimension and memory. Our contributions are: (1) we derive an inequality for the classical dimension needed to reproduce anticorrelated probability distributions; (2) we show that this inequality can be saturated, and this event displays quadratic quantum advantage with respect to classical siulation; (3) we prove that there is a unique strategy saturating the inequality, and thus find a method to self-test SIC-POVMs; (4) we engineer a certification protocol with low experimental error; and (5) we perform this method experimentally with orbital angular momentum with noise tolerance, thus certifying quantumness in practice. In this talk we will summarize the main ingredients of prepare-measure setup under consideration, sketch the results presented, and explain their implications in practical remote quantum certification for distant communication protocols.
Keywords: Quantum; Certification; Correlation; Communication; Experiment