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Dokument Type: Article
metadata.dc.title: Symmetries in quantum networks lead to no-go theorems for entanglement distribution and to verification techniques
Authors: Hansenne, Kiara 
Xu, Zhen-Peng 
Kraft, Tristan 
Gühne, Otfried 
Institute: Department Physik 
Free keywords: Quantum information, Qubits
Dewey Decimal Classification: 530 Physik
Issue Date: 2022
Publish Date: 2023
Source: Nature communications ; 13, article number 496. -
Quantum networks are promising tools for the implementation of long-range quantum communication. The characterization of quantum correlations in networks and their usefulness for information processing is therefore central for the progress of the field, but so far only results for small basic network structures or pure quantum states are known. Here we show that symmetries provide a versatile tool for the analysis of correlations in quantum networks. We provide an analytical approach to characterize correlations in large network structures with arbitrary topologies. As examples, we show that entangled quantum states with a bosonic or fermionic symmetry can not be generated in networks; moreover, cluster and graph states are not accessible. Our methods can be used to design certification methods for the functionality of specific links in a network and have implications for the design of future network structures.
Finanziert im Rahmen der DEAL-Verträge durch die Universitätsbibliothek Siegen
URN: urn:nbn:de:hbz:467-24306
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