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Orbital angular momentum of photons and the entanglement of Laguerre-Gaussian modes

Autor(en)
Mario Krenn, Mehul Malik, Manuel Erhard, Anton Zeilinger
Abstrakt

The identification of orbital angular momentum (OAM) as a fundamental property of a beam of light nearly twenty-five years ago has led to an extensive body of research around this topic. The possibility that single photons can carry OAM has made this degree of freedom an ideal candidate for the investigation of complex quantum phenomena and their applications. Research in this direction has ranged from experiments on complex forms of quantum entanglement to the interaction between light and quantum states of matter. Furthermore, the use of OAM in quantum information has generated a lot of excitement, as it allows for encoding large amounts of information on a single photon. Here we explain the intuition that led to the first quantum experiment with OAM fifteen years ago. We continue by reviewing some key experiments investigating fundamental questions on photonic OAM and the first steps into applying these properties in novel quantum protocols. In the end, we identify several interesting open questions that could form the subject of future investigations with OAM.

Organisation(en)
Quantenoptik, Quantennanophysik und Quanteninformation
Externe Organisation(en)
Österreichische Akademie der Wissenschaften (ÖAW)
Journal
Philosophical Transactions of the Royal Society of London. Mathematical, Physical and Engineering Sciences
Band
375
Anzahl der Seiten
21
ISSN
1364-503X
DOI
https://doi.org/10.1098/rsta.2015.0442
Publikationsdatum
02-2017
Peer-reviewed
Ja
ÖFOS 2012
103025 Quantenmechanik, 103026 Quantenoptik
Schlagwörter
ASJC Scopus Sachgebiete
Allgemeiner Maschinenbau, Allgemeine Physik und Astronomie, Allgemeine Mathematik
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/7517091e-4df1-43cc-82c7-a3a27fce7288