Fibre based hyperentanglement generation for dense wavelength division multiplexing. (24th September 2019)

• Record Type: Journal Article
• Authors: Vergyris, Panagiotis; Mazeas, Florent; Gouzien, Elie; Labonté, Laurent; Alibart, Olivier; Tanzilli, Sébastien; Kaiser, Florian
• Is Part Of: Quantum science and technology. Volume 4:Number 4(2019)
• Publication Date: 2019-09-24
• Subjects: quantum optics -- entanglement -- hyperentanglement -- nonlinear optics; Quantum theory -- Periodicals; Quantum theory; Periodicals; 530
• DOI: 10.1088/2058-9565/ab3f59
• Languages: English
• ISSNs: 2058-9565

Abstract

Abstract: Entanglement is a key resource in quantum information science and associated emerging technologies. Photonic systems offer a large range of exploitable entanglement degrees of freedom (DOF) such as frequency, time, polarization, and spatial modes. Hyperentangled photons exploit multiple DOF simultaneously to enhance the performance of quantum information protocols. Here, we report a fully guided-wave approach for generating polarization and energy-time hyperentangled photons at telecom wavelengths. Moreover, by demultiplexing the broadband emission spectrum of the source into five standard telecom channel pairs, we demonstrate compliance with fibre network standards and improve the effective bit rate capacity of the quantum channel up to one order of magnitude. In all channel pairs, we observe a violation of a generalised Bell inequality by more than 27 standard deviations, underlining the relevance of our approach.