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Xiang-Ling Xu

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Preprint Oct 2026

An operational characterization of finite-dimensional quantum theory

A key goal in the foundations of quantum mechanics is to identify operational constraints characterizing physical theories. Bell inequalities do so for classical probability theory, while Tsirelson's bound provides a first step for quantum mechanics. Here, we address the dual question: Can one certify that all correlat...

Lionel J. Dmello, Xiang-Ling Xu, Marc-Olivier Renou et al. · 0 citations
Preprint Sep 2026

Quantum inflation and source-transfer hierarchies are complete for tree networks

Understanding the capabilities and limits of quantum systems is central to quantum information processing. This includes determining which correlations can arise in networks of quantum systems distributed by independent sources. Yet for general quantum networks, no systematic, dimension-free method is known to bound th...

Xiang-Ling Xu, Igor Klep, Marc-Olivier Renou · 0 citations

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