Distribution of high-dimensional entanglement via an intra-city free-space link

Fabian Steinlechner (), Sebastian Ecker, Matthias Fink, Bo Liu, Jessica Bavaresco, Marcus Huber, Thomas Scheidl and Rupert Ursin ()
Additional contact information
Fabian Steinlechner: Institute for Quantum Optics and Quantum Information (IQOQI), Austrian Academy of Sciences
Sebastian Ecker: Institute for Quantum Optics and Quantum Information (IQOQI), Austrian Academy of Sciences
Matthias Fink: Institute for Quantum Optics and Quantum Information (IQOQI), Austrian Academy of Sciences
Bo Liu: Institute for Quantum Optics and Quantum Information (IQOQI), Austrian Academy of Sciences
Jessica Bavaresco: Institute for Quantum Optics and Quantum Information (IQOQI), Austrian Academy of Sciences
Marcus Huber: Institute for Quantum Optics and Quantum Information (IQOQI), Austrian Academy of Sciences
Thomas Scheidl: Institute for Quantum Optics and Quantum Information (IQOQI), Austrian Academy of Sciences
Rupert Ursin: Institute for Quantum Optics and Quantum Information (IQOQI), Austrian Academy of Sciences

Nature Communications, 2017, vol. 8, issue 1, 1-7

Abstract: Abstract Quantum entanglement is a fundamental resource in quantum information processing and its distribution between distant parties is a key challenge in quantum communications. Increasing the dimensionality of entanglement has been shown to improve robustness and channel capacities in secure quantum communications. Here we report on the distribution of genuine high-dimensional entanglement via a 1.2-km-long free-space link across Vienna. We exploit hyperentanglement, that is, simultaneous entanglement in polarization and energy-time bases, to encode quantum information, and observe high-visibility interference for successive correlation measurements in each degree of freedom. These visibilities impose lower bounds on entanglement in each subspace individually and certify four-dimensional entanglement for the hyperentangled system. The high-fidelity transmission of high-dimensional entanglement under real-world atmospheric link conditions represents an important step towards long-distance quantum communications with more complex quantum systems and the implementation of advanced quantum experiments with satellite links.

Date: 2017
References: Add references at CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.nature.com/articles/ncomms15971 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms15971

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/ncomms15971

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().