Bell nonlocality in networks
Bell's theorem proves that quantum theory is inconsistent with local physical models. It has
propelled research in the foundations of quantum theory and quantum information science …
propelled research in the foundations of quantum theory and quantum information science …
Semidefinite programming relaxations for quantum correlations
Semidefinite programs are convex optimization problems involving a linear objective
function and a domain of positive-semidefinite matrices. Over the past two decades, they …
function and a domain of positive-semidefinite matrices. Over the past two decades, they …
Full network nonlocality
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 …
the concept of full network nonlocality, which describes correlations that necessitate all links …
Experimental nonclassicality in a causal network without assuming freedom of choice
In a Bell experiment, it is natural to seek a causal account of correlations wherein only a
common cause acts on the outcomes. For this causal structure, Bell inequality violations can …
common cause acts on the outcomes. For this causal structure, Bell inequality violations can …
Bilocal Bell inequalities violated by the quantum elegant joint measurement
Network Bell experiments give rise to a form of quantum nonlocality that conceptually goes
beyond Bell's theorem. We investigate here the simplest network, known as the bilocality …
beyond Bell's theorem. We investigate here the simplest network, known as the bilocality …
No bipartite-nonlocal causal theory can explain nature's correlations
We show that some tripartite quantum correlations are inexplicable by any causal theory
involving bipartite nonclassical common causes and unlimited shared randomness. This …
involving bipartite nonclassical common causes and unlimited shared randomness. This …
Symmetries in quantum networks lead to no-go theorems for entanglement distribution and to verification techniques
Quantum networks are promising tools for the implementation of long-range quantum
communication. The characterization of quantum correlations in networks and their …
communication. The characterization of quantum correlations in networks and their …
Certification of non-classicality in all links of a photonic star network without assuming quantum mechanics
NN Wang, A Pozas-Kerstjens, C Zhang, BH Liu… - Nature …, 2023 - nature.com
Networks composed of independent sources of entangled particles that connect distant
users are a rapidly developing quantum technology and an increasingly promising test-bed …
users are a rapidly developing quantum technology and an increasingly promising test-bed …
Semidefinite tests for quantum network topologies
Quantum networks play a major role in long-distance communication, quantum
cryptography, clock synchronization, and distributed quantum computing. Generally, these …
cryptography, clock synchronization, and distributed quantum computing. Generally, these …