3 papers
quant-ph2026
Almost all pure entangled states enable unbounded nonlocality sharing
Anna Steffinlongo, Nicola D'Alessandro, Martin J. Renner
We establish a connection between Hardy's paradox and nonlocality sharing in sequential bipartite scenarios, where each subsystem is measured in turn by a chain of observers. We sh…
quant-ph2026
Simulating Noncausality with Quantum Control of Causal Orders
Anna Steffinlongo, Hippolyte Dourdent
Logical consistency with free local operations is compatible with non-trivial classical communications, where all parties can be both in each other's past and future-a phenomenon k…
quant-ph2025
Long-distance device-independent quantum key distribution using single-photon entanglement
Anna Steffinlongo, Mariana Navarro, Marina Cenni +3
Device-independent quantum key distribution (DIQKD) provides the strongest form of quantum security, as it allows two honest users to establish secure communication channels even w…