Bell monogamy relations in arbitrary qubit networks

• Main Authors: Ramanathan, R., McKague, M., Kaszlikowski, D., Tran, Minh Cong, Paterek, Tomasz
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2018
• Subjects: Arbitrary Qubit Networks; Bell Monogamy Relations; DRNTU::Science::Physics
• Online Access: https://hdl.handle.net/10356/89176; http://hdl.handle.net/10220/47039
• Institution: Nanyang Technological University

Characterizing tradeoffs between simultaneous violations of multiple Bell inequalities in a large network has important physical consequences but is computationally demanding. We propose a graph-theoretic approach to efficiently produce Bell monogamy relations in arbitrary arrangements of qubits. All the relations obtained for bipartite Bell inequalities are tight and leverage only a single Bell monogamy relation. This feature is unique to bipartite Bell inequalities, as we show that there is no finite set of such elementary monogamy relations for multipartite inequalities. Nevertheless, many tight monogamy relations for multipartite inequalities can be obtained with our method as shown in explicit examples.