Full network nonlocality

Understand

Networks have advanced the study of nonlocality beyond Bell's theorem.

• Here, we introduce the concept of full network nonlocality, which describes correlations that necessitate all links in a network to distribute nonlocal resources.
• Showcasing that this notion is stronger than standard network nonlocality, we prove that the most well-known network Bell test does not witness full network nonlocality.
• In contrast, we demonstrate that its generalisation to star networks is capable of detecting full network nonlocality in quantum theory.