By IQT News posted 28 Jan 2020

(Phys.org) research done at the University of the Witwatersrand in Johannesburg, South Africa, and Huazhang University of Science and Technology in Wuhan, China, has exciting implications for secure data transfer across optical fiber networks. The team have demonstrated that multiple quantum patterns of twisted light can be transmitted across a conventional fiber link that, paradoxically, supports only one pattern. The implication is a new approach to realizing a future quantum network, harnessing multiple dimensions of entangled quantum light.
The team demonstrated transfer of multi-dimensional entanglement states over 250 m of single-mode fiber, showing that an infinite number of two-dimensional subspaces could be realized. Each subspace could be used for sending information, or multiplexing information to multiple receivers.
“A consequence of this new approach is that the entire high-dimensional OAM Hilbert space can be accessed, but two dimensions at a time. In some sense it is a compromise between simple 2-D approaches and true high-dimensional approaches,” says Forbes. Importantly, high-dimensional states are unsuitable for transmission over conventional fiber networks, whereas this new approach allows legacy networks to be used.

Subscribe to Our Email Newsletter

Stay up-to-date on all the latest news from the Quantum Technology industry and receive information and offers from third party vendors.

  • Forthcoming Events

    • IQT Fall | November 1-5, 2021
      Online & In-Person New York City
    • IQT, The Hague, The Netherlands | February 21-23, 2022
    • IQT Spring | May 10-12, 2022
      Online & In-Person San Diego
    • IQT Asia-Pacific Singapore 2022 | Dates Forthcoming
    • For additional information: info@3drholdings.com
0