Guarantees on the structure of experimental quantum networks

Andrés Ulibarrena; Jonathan W. Webb; Alexander Pickston; Joseph Ho; Alessandro Fedrizzi; Alejandro Pozas-Kerstjens

doi:10.1038/s41534-024-00911-z

Guarantees on the structure of experimental quantum networks

Andrés Ulibarrena^*, Jonathan W. Webb, Alexander Pickston, Joseph Ho, Alessandro Fedrizzi, Alejandro Pozas-Kerstjens^*

^*Corresponding author for this work

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Abstract

Quantum networks connect and supply a large number of nodes with multi-party quantum resources for secure communication, networked quantum computing and distributed sensing. As these networks grow in size, certification tools will be required to answer questions regarding their properties. In this work we demonstrate a general method to guarantee that certain correlations cannot be generated in a given quantum network. We apply quantum inflation methods to data obtained in quantum group encryption experiments, guaranteeing the impossibility of producing the observed results in networks with fewer optical elements. Our results pave the way for scalable methods of obtaining device-independent guarantees on the network structure underlying multipartite quantum protocols.

Original language	English
Article number	117
Journal	npj Quantum Information
Volume	10
DOIs	https://doi.org/10.1038/s41534-024-00911-z
Publication status	Published - 14 Nov 2024

Keywords

Optics and photonics
Quantum information

ASJC Scopus subject areas

Computer Science (miscellaneous)
Statistical and Nonlinear Physics
Computer Networks and Communications
Computational Theory and Mathematics

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AU - Pozas-Kerstjens, Alejandro

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AB - Quantum networks connect and supply a large number of nodes with multi-party quantum resources for secure communication, networked quantum computing and distributed sensing. As these networks grow in size, certification tools will be required to answer questions regarding their properties. In this work we demonstrate a general method to guarantee that certain correlations cannot be generated in a given quantum network. We apply quantum inflation methods to data obtained in quantum group encryption experiments, guaranteeing the impossibility of producing the observed results in networks with fewer optical elements. Our results pave the way for scalable methods of obtaining device-independent guarantees on the network structure underlying multipartite quantum protocols.

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Guarantees on the structure of experimental quantum networks

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Keywords

ASJC Scopus subject areas

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