Quantum Nonlocality

An operational characterization of finite-dimensional quantum theory

Two-body correlations, together with stability under iterated teleportation, characterize finite-dimensional quantum theory and certify Bell violations beyond those directly …

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

Beyond qubits: fermionic nonlocality in distributed quantum computing

Can fermions do more than qubits in distributed computation? Yes—we show that their correlations cannot be reproduced by any qubit- or boson-based protocol without additional …

Xiangling Xu 许湘灵

• 2026-07-02

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Fermions are fundamentally more nonlocal than Bosons

Talks and posters 2026-08 International Symposium on Mathematical Theory of Networks and Systems (MTNS 2026) (by Fatemeh Moradi Kalarde) 2026-08 CQCC & GQSF 2026 (poster)

Two convergent NPA-like hierarchies for the quantum bilocal scenario

Talks and posters 2024-11 YQIS24 (poster) 2024-11 2nd Colloquium GdR TeQ (poster) 2024-09 CausalWorlds 2024 2023-11 Defi EQIP Workshop

Characterizing quantum bilocal networks with generalized NPA hierarchies

Which quantum correlations can two independent sources produce? We use operator algebras to characterize the limits of semidefinite hierarchies for the simplest quantum network.

Xiangling Xu 许湘灵

• 2024-09-18

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Quantum Nonlocality in Bilocal Networks: An Operator Algebraic Perspective