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

Fickler, R., Lapkiewicz, R., Huber, M., Lavery, M. P.J., Padgett, M. J. and Zeilinger, A. (2014) Interface between path and orbital angular momentum entanglement for high-dimensional photonic quantum information. Nature Communications, 5(4502), (doi:10.1038/ncomms5502)

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Abstract

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.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Lavery, Dr Martin and Padgett, Professor Miles
Authors: Fickler, R., Lapkiewicz, R., Huber, M., Lavery, M. P.J., Padgett, M. J., and Zeilinger, A.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
College of Science and Engineering > School of Physics and Astronomy
Journal Name:Nature Communications
Publisher:Nature Publishing Group
ISSN:2041-1723
ISSN (Online):2041-1723

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
549871Challenges in Orbital Angular MomentumMiles PadgettEngineering & Physical Sciences Research Council (EPSRC)EP/I012451/1P&A - PHYSICS & ASTRONOMY