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Title: Multipartite entanglement verification resistant against dishonest parties
Authors: Pappa, A.
Chailloux, A.
Wehner, S. 
Diamanti, E.
Kerenidis, I.
Issue Date: 2012
Citation: Pappa, A., Chailloux, A., Wehner, S., Diamanti, E., Kerenidis, I. (2012). Multipartite entanglement verification resistant against dishonest parties. Physical Review Letters 108 (26). ScholarBank@NUS Repository.
Abstract: Future quantum information networks will consist of quantum and classical agents, who have the ability to communicate in a variety of ways with trusted and untrusted parties and securely delegate computational tasks to untrusted large-scale quantum computing servers. Multipartite quantum entanglement is a fundamental resource for such a network and, hence, it is imperative to study the possibility of verifying a multipartite entanglement source in a way that is efficient and provides strong guarantees even in the presence of multiple dishonest parties. In this Letter, we show how an agent of a quantum network can perform a distributed verification of a source creating multipartite Greenberger-Horne-Zeilinger (GHZ) states with minimal resources, which is, nevertheless, resistant against any number of dishonest parties. Moreover, we provide a tight tradeoff between the level of security and the distance between the state produced by the source and the ideal GHZ state. Last, by adding the resource of a trusted common random source, we can further provide security guarantees for all honest parties in the quantum network simultaneously. © 2012 American Physical Society.
Source Title: Physical Review Letters
ISSN: 00319007
DOI: 10.1103/PhysRevLett.108.260502
Appears in Collections:Staff Publications

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