Open AccessFibre based hyperentanglement generation for dense wavelength division multiplexing
Author(s) -
Panagiotis Vergyris,
Florent Mazeas,
Élie Gouzien,
Laurent Labonté,
Olivier Alibart,
Sébastien Tanzilli,
Florian Kaiser
Publication year - 2019
Publication title -
quantum science and technology
Language(s) - English
Resource type - Journals
ISSN - 2058-9565
DOI - 10.1088/2058-9565/ab3f59
Subject(s) - quantum entanglement , physics , photon , photon entanglement , photonics , multiplexing , broadband , quantum information science , quantum key distribution , polarization (electrochemistry) , computer science , electronic engineering , telecommunications , quantum , optics , quantum mechanics , engineering , chemistry
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.