Air-core fiber distribution of hybrid vector vortex-polarization entangled states

Daniele Cozzolino, Emanuele Polino, Mauro Valeri, Gonzalo Carvacho, Davide Bacco, Nicolò Spagnolo, Leif Katsuo Oxenløwe, Fabio Sciarrino

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Abstract

Entanglement distribution between distant parties is one of the most important and challenging tasks in quantum communication. Distribution of photonic entangled states using optical fiber links is a fundamental building block towards quantum networks. Among the different degrees of freedom, orbital angular momentum (OAM) is one of the most promising due to its natural capability to encode high dimensional quantum states. In this article, we experimentally demonstrate fiber distribution of hybrid polarization-vector vortex entangled photon pairs. To this end, we exploit a recently developed air-core fiber which supports OAM modes. High fidelity distribution of the entangled states is demonstrated by performing quantum state tomography in the polarization-OAM Hilbert space after fiber propagation, and by violations of Bell inequalities and multipartite entanglement tests. The present results open new scenarios for quantum applications where correlated complex states can be transmitted by exploiting the vectorial nature of light.
Original languageEnglish
Article number046005
JournalAdvanced Photonics
Volume1
Issue number4
Number of pages9
ISSN2577-5421
DOIs
Publication statusPublished - 2019

Keywords

  • Orbital angular momentum
  • Quantum communication
  • Structured light
  • Multimode fiber
  • Multipartite entanglement

Cite this

Cozzolino, Daniele ; Polino, Emanuele ; Valeri, Mauro ; Carvacho, Gonzalo ; Bacco, Davide ; Spagnolo, Nicolò ; Oxenløwe, Leif Katsuo ; Sciarrino, Fabio. / Air-core fiber distribution of hybrid vector vortex-polarization entangled states. In: Advanced Photonics. 2019 ; Vol. 1, No. 4.
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abstract = "Entanglement distribution between distant parties is one of the most important and challenging tasks in quantum communication. Distribution of photonic entangled states using optical fiber links is a fundamental building block towards quantum networks. Among the different degrees of freedom, orbital angular momentum (OAM) is one of the most promising due to its natural capability to encode high dimensional quantum states. In this article, we experimentally demonstrate fiber distribution of hybrid polarization-vector vortex entangled photon pairs. To this end, we exploit a recently developed air-core fiber which supports OAM modes. High fidelity distribution of the entangled states is demonstrated by performing quantum state tomography in the polarization-OAM Hilbert space after fiber propagation, and by violations of Bell inequalities and multipartite entanglement tests. The present results open new scenarios for quantum applications where correlated complex states can be transmitted by exploiting the vectorial nature of light.",
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Air-core fiber distribution of hybrid vector vortex-polarization entangled states. / Cozzolino, Daniele; Polino, Emanuele; Valeri, Mauro; Carvacho, Gonzalo; Bacco, Davide; Spagnolo, Nicolò; Oxenløwe, Leif Katsuo; Sciarrino, Fabio.

In: Advanced Photonics, Vol. 1, No. 4, 046005, 2019.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Air-core fiber distribution of hybrid vector vortex-polarization entangled states

AU - Cozzolino, Daniele

AU - Polino, Emanuele

AU - Valeri, Mauro

AU - Carvacho, Gonzalo

AU - Bacco, Davide

AU - Spagnolo, Nicolò

AU - Oxenløwe, Leif Katsuo

AU - Sciarrino, Fabio

PY - 2019

Y1 - 2019

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AB - Entanglement distribution between distant parties is one of the most important and challenging tasks in quantum communication. Distribution of photonic entangled states using optical fiber links is a fundamental building block towards quantum networks. Among the different degrees of freedom, orbital angular momentum (OAM) is one of the most promising due to its natural capability to encode high dimensional quantum states. In this article, we experimentally demonstrate fiber distribution of hybrid polarization-vector vortex entangled photon pairs. To this end, we exploit a recently developed air-core fiber which supports OAM modes. High fidelity distribution of the entangled states is demonstrated by performing quantum state tomography in the polarization-OAM Hilbert space after fiber propagation, and by violations of Bell inequalities and multipartite entanglement tests. The present results open new scenarios for quantum applications where correlated complex states can be transmitted by exploiting the vectorial nature of light.

KW - Orbital angular momentum

KW - Quantum communication

KW - Structured light

KW - Multimode fiber

KW - Multipartite entanglement

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