Dresden 2026 – wissenschaftliches Programm
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QI: Fachverband Quanteninformation
QI 12: Quantum Foundations
QI 12.6: Vortrag
Mittwoch, 11. März 2026, 16:15–16:30, BEY/0137
Witnessing nonstabilizerness with Bell inequalities — Rafael Macêdo1,2, •Patrick Andriolo2,3,4, Santiago Zamora1,2, Davide Poderini2,5, and Rafael Chaves2,6 — 1Departamento de Física Teórica e Experimental, Universidade Federal do Rio Grande do Norte, 59078-970 Natal-RN, Brazil — 2International Institute of Physics, Federal University of Rio Grande do Norte, 59078-970, Natal, Brazil — 3Physics Institute, University of São Paulo, Rua do Matão, 1371, São Paulo, Brazil — 4Atominstitut, Technische Universität Wien, Stadionallee 2, 1020 Vienna, Austria — 5Università degli Studi di Pavia, Dipartimento di Fisica, QUIT Group, via Bassi 6, 27100 Pavia, Italy — 6School of Science and Technology, Federal University of Rio Grande do Norte, 59078-970 Natal, Brazil
Non-stabilizerness is a fundamental resource for quantum computation, enabling quantum algorithms to surpass classical capabilities. Despite its importance, characterizing this resource remains challenging due to the intricate geometry of stabilizer polytopes and the difficulty of simulating non-stabilizer states. In this work, through device-independent considerations, we reveal an unexpected connection between non-stabilizerness and Bell inequalities. Although certain stabilizer states can already achieve maximal violations of specific Bell inequalities, we demonstrate that appropriately constructed Bell inequalities can nevertheless serve as witnesses of non-stabilizerness, revealing when a state lies beyond the stabilizer set. This uncovers a novel relationship between the device-independent framework and quantum computation. Phys. Rev. A 112, L050401.
Keywords: Bell nonlocality; Bell inequalities; Magic; Nonstabilizerness; Optimization