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Interface between path and orbital angular momentum entanglement for high-dimensional photonic quantum information

Autor(en)
Robert Fickler, Radek Lapkiewicz, Marcus Huber, Martin P.J. Lavery, Miles J. Padgett, Anton Zeilinger
Abstrakt

Photonics has become a mature field of quantum information science, where integrated optical circuits offer a way to scale the complexity of the set-up as well as the dimensionality of the quantum state. On photonic chips, paths are the natural way to encode information. To distribute those high-dimensional quantum states over large distances, transverse spatial modes, like orbital angular momentum possessing Laguerre Gauss modes, are favourable as flying information carriers. Here we demonstrate a quantum interface between these two vibrant photonic fields. We create three-dimensional path entanglement between two photons in a nonlinear crystal and use a mode sorter as the quantum interface to transfer the entanglement to the orbital angular momentum degree of freedom. Thus our results show a flexible way to create high-dimensional spatial mode entanglement. Moreover, they pave the way to implement broad complex quantum networks where high-dimensionally entangled states could be distributed over distant photonic chips.

Organisation(en)
Quantenoptik, Quantennanophysik und Quanteninformation
Externe Organisation(en)
The Institute of Photonic Sciences, University of Glasgow
Journal
Nature Communications
Band
5
Anzahl der Seiten
6
ISSN
2041-1723
DOI
https://doi.org/10.1038/ncomms5502
Publikationsdatum
07-2014
Peer-reviewed
Ja
ÖFOS 2012
103025 Quantenmechanik, 103026 Quantenoptik
ASJC Scopus Sachgebiete
General, Allgemeine Physik und Astronomie, Allgemeine Chemie, Allgemeine Biochemie, Genetik und Molekularbiologie
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/18c1b657-739c-4182-b12a-0cc1fb930edc