High-dimensional entanglement certification

Zixin Huang, Lorenzo Maccone, Akib Karim, Chiara Macchiavello, Robert J. Chapman, Alberto Peruzzo*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)
25 Downloads (Pure)

Abstract

Quantum entanglement is the ability of joint quantum systems to possess global properties (correlation among systems) even when subsystems have no definite individual property. Whilst the 2-dimensional (qubit) case is well-understood, currently, tools to characterise entanglement in high dimensions are limited. We experimentally demonstrate a new procedure for entanglement certification that is suitable for large systems, based entirely on information-theoretics. It scales more efficiently than Bell's inequality and entanglement witness. The method we developed works for arbitrarily large system dimension d and employs only two local measurements of complementary properties. This procedure can also certify whether the system is maximally entangled. We illustrate the protocol for families of bipartite states of qudits with dimension up to 32 composed of polarisation-entangled photon pairs.

Original languageEnglish
Article number27637
Pages (from-to)1-7
Number of pages7
JournalScientific Reports
Volume6
DOIs
Publication statusPublished - 17 Jun 2016
Externally publishedYes

Bibliographical note

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