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 …

A free energy principle for generic quantum systems

C Fields, K Friston, JF Glazebrook, M Levin - Progress in Biophysics and …, 2022 - Elsevier
Abstract The Free Energy Principle (FEP) states that under suitable conditions of weak
coupling, random dynamical systems with sufficient degrees of freedom will behave so as to …

Testing real quantum theory in an optical quantum network

ZD Li, YL Mao, M Weilenmann, A Tavakoli, H Chen… - Physical Review Letters, 2022 - APS
Quantum theory is commonly formulated in complex Hilbert spaces. However, the question
of whether complex numbers need to be given a fundamental role in the theory has been …

Ruling out real-valued standard formalism of quantum theory

MC Chen, C Wang, FM Liu, JW Wang, C Ying… - Physical Review Letters, 2022 - APS
Standard quantum theory was formulated with complex-valued Schrödinger equations,
wave functions, operators, and Hilbert spaces. Previous work attempted to simulate quantum …

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 …

Entanglement swapping 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 swapping
based on quantum elegant joint measurements. These are joint projections of two qubits …

Quantum networks self-test all entangled states

I Šupić, J Bowles, MO Renou, A Acín, MJ Hoban - Nature Physics, 2023 - nature.com
Certifying quantum properties with minimal assumptions is a fundamental problem in
quantum information science. Self-testing is a method to infer the underlying physics of a …

Semidefinite programming relaxations for quantum correlations

A Tavakoli, A Pozas-Kerstjens, P Brown… - arXiv preprint arXiv …, 2023 - arxiv.org
Semidefinite programs are convex optimisation problems involving a linear objective
function and a domain of positive semidefinite matrices. Over the last two decades, they …

Structural balance and random walks on complex networks with complex weights

Y Tian, R Lambiotte - SIAM Journal on Mathematics of Data Science, 2024 - SIAM
Complex numbers define the relationship between entities in many situations. A canonical
example would be the off-diagonal terms in a Hamiltonian matrix in quantum physics …

Complex networks with complex weights

L Böttcher, MA Porter - Physical Review E, 2024 - APS
In many studies, it is common to use binary (ie, unweighted) edges to examine networks of
entities that are either adjacent or not adjacent. Researchers have generalized such binary …