As a part of our efforts to increase collaboration between the "classical" Internet and quantum networking research, we are republishing the summary of a research paper on "heterogeneous quantum networks".
Since 2017, the RIPE NCC has helped introduce quantum networking to the RIPE community. We held two Quantum Internet hackathons (in 2018 and 2019) and also supported the establishment of the Quantum Internet Research Group as part of the Internet Research Task Force. We would like to draw your attention to a recent research paper in that field.
Connecting heterogeneous quantum networks by hybrid entanglement swapping
Authors: Giovanni Guccione, Tom Darras, Hanna Le Jeannic, Varun B. Verma, Sae Woo Nam, Adrien Cavaillès and Julien Laurat
Recent advances in quantum technologies are rapidly stimulating the building of quantum networks. With the parallel development of multiple physical platforms and different types of encodings, a challenge for present and future networks is to uphold a heterogeneous structure for full functionality and therefore support modular systems that are not necessarily compatible with one another.
Central to this endeavour is the capability to distribute and interconnect optical entangled states relying on different discrete and continuous quantum variables. As part of their research, the authors introduce and demonstrate an entanglement swapping protocol that connects nodes with different optical encodings. The swapping process is of paramount importance in the context of quantum connection as it allows the distribution of entanglement over nodes that would be too distant for direct propagation.
This core capability opens attractive opportunities for the establishment of remote hybrid quantum links and the development of heterogeneous quantum networks, enabling more versatile quantum information interconnects. An exciting future prospect will be to couple such hybrid entanglement to matter systems and to link thereby not only different encodings but also quantum devices of a different nature with complementary functionalities.