Maximal qubit violation of n-local inequalities in quantum network
Abstract
Source independent quantum networks are considered as a natural generalization to the Bell scenario where we investigate the nonlocal properties of quantum states distributed and measured in a network. Considering the simplest network of entanglement swapping, recently Gisin et. al. and Andreoli et. al. independently provided a systematic characterization of the set of quantum states leading to violation of the so-called 'bilocality' inequality. In this work, we consider the complexities in the quantum networks with an arbitrary number of parties distributed in chain-shaped and star-shaped networks. We derive the maximal violation of the 'n-local' inequality that can be achieved by arbitrary two-qubit states for such chain and star-shaped networks. This would further provide us deeper understanding of quantum correlations in complex structures.
Keywords
Cite
@article{arxiv.2011.03513,
title = {Maximal qubit violation of n-local inequalities in quantum network},
author = {Amit Kundu and Mostak Kamal Molla and Indrani Chattopadhyay and Debasis Sarkar},
journal= {arXiv preprint arXiv:2011.03513},
year = {2020}
}
Comments
9 pages, 5 figures, revtex, comments welcome