Experimental verification of multipartite entanglement in quantum networks.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 27827361.
- Also identified by DOI 10.1038/ncomms13251 and PMC identifier 5105160.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Multipartite entangled states are a fundamental resource for a wide range of quantum information processing tasks. In particular, in quantum networks, it is essential for the parties involved to be able to verify if entanglement is present before they carry out a given distributed task. Here we design and experimentally demonstrate a protocol that allows any party in a network to check if a source is distributing a genuinely multipartite entangled state, even in the presence of untrusted parties. The protocol remains secure against dishonest behaviour of the source and other parties, including the use of system imperfections to their advantage. We demonstrate the verification protocol in a three- and four-party setting using polarization-entangled photons, highlighting its potential for realistic photonic quantum communication and networking applications.
Medical subject headings
- Computer-Aided Design
- Electronic Data Processing
- Photons
- Quantum Theory