Bell nonlocality in networks

A Tavakoli, A Pozas-Kerstjens, MX Luo… - Reports on Progress in …, 2022 - iopscience.iop.org
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 …

Semidefinite programming relaxations for quantum correlations

A Tavakoli, A Pozas-Kerstjens, P Brown… - Reviews of Modern Physics, 2024 - APS
Semidefinite programs are convex optimization problems involving a linear objective
function and a domain of positive-semidefinite matrices. Over the past two decades, they …

Full network nonlocality

A Pozas-Kerstjens, N Gisin, A Tavakoli - Physical review letters, 2022 - APS
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 inflation technique for causal inference with latent variables

E Wolfe, RW Spekkens, T Fritz - Journal of Causal Inference, 2019 - degruyter.com
The problem of causal inference is to determine if a given probability distribution on
observed variables is compatible with some causal structure. The difficult case is when the …

Entanglement swap** and quantum correlations via symmetric joint measurements

CX Huang, XM Hu, Y Guo, C Zhang, BH Liu… - Physical Review Letters, 2022 - APS
We use hyperentanglement to experimentally realize deterministic entanglement swap**
based on quantum elegant joint measurements. These are joint projections of two qubits …

Quantifying Bell: The resource theory of nonclassicality of common-cause boxes

E Wolfe, D Schmid, AB Sainz, R Kunjwal… - Quantum, 2020 - quantum-journal.org
We take a resource-theoretic approach to the problem of quantifying nonclassicality in Bell
scenarios. The resources are conceptualized as probabilistic processes from the setting …

Bilocal Bell inequalities violated by the quantum elegant joint measurement

A Tavakoli, N Gisin, C Branciard - Physical review letters, 2021 - APS
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 …

Nonlinear Bell inequalities tailored for quantum networks

D Rosset, C Branciard, TJ Barnea, G Pütz, N Brunner… - Physical review …, 2016 - APS
In a quantum network, distant observers sharing physical resources emitted by independent
sources can establish strong correlations, which defy any classical explanation in terms of …

Polynomial bell inequalities

R Chaves - Physical review letters, 2016 - APS
It is a recent realization that many of the concepts and tools of causal discovery in machine
learning are highly relevant to problems in quantum information, in particular quantum …

Network quantum steering

BDM Jones, I Šupić, R Uola, N Brunner… - Physical Review Letters, 2021 - APS
The development of large-scale quantum networks promises to bring a multitude of
technological applications as well as shed light on foundational topics, such as quantum …