Cyclic transformation of orbital angular momentum modes

Autor(en)

Florian Schlederer, Mario Krenn, Robert Fickler, Mehul Malik, Anton Zeilinger

Abstrakt

The spatial modes of photons are one realization of a QuDit, a quantum system that is described in a D-dimensional Hilbert space. In order to perform quantum information tasks with QuDits, a general class of D-dimensional unitary transformations is needed. Among these, cyclic transformations are an important special case required in many high-dimensional quantum communication protocols. In this paper, we experimentally demonstrate a cyclic transformation in the high-dimensional space of photonic orbital angular momentum (OAM). Using simple linear optical components, we show a successful four-fold cyclic transformation of OAM modes. Interestingly, our experimental setup was found by a computer algorithm. In addition to the four-cyclic transformation, the algorithm also found extensions to higher-dimensional cycles in a hybrid space of OAM and polarization. Besides being useful for quantum cryptography with QuDits, cyclic transformations are key for the experimental production of high-dimensional maximally entangled Bell-states.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Österreichische Akademie der Wissenschaften (ÖAW), University of Ottawa

Journal

New Journal of Physics

Band

18

Anzahl der Seiten

8

ISSN

1367-2630

DOI

https://doi.org/10.1088/1367-2630/18/4/043019

Publikationsdatum

04-2016

Peer-reviewed

Ja

ÖFOS 2012

103026 Quantenoptik

Schlagwörter

ASJC Scopus Sachgebiete

Allgemeine Physik und Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/ee0e85ac-0892-4fea-a1b5-52cf6bc73caf