Fibre based hyperentanglement generation for dense wavelength division multiplexing
arXiv:1807.04498
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 such as frequency, time, polarization, and spatial modes. Hyperentangled photons exploit multiple degrees of freedom 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.
arXiv comment6 pages, 3 figures
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- Satellite Relayed Global Quantum Communication without Quantum Memory
- Recent advances in high-dimensional mode-locked quantum frequency combs
- Energy-time and time-bin entanglement: past, present and future
- Building a controlled-NOT gate between polarization and frequency
- Resilient Entanglement Distribution in a Multihop Quantum Network