Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session Q53: Quantum Networks: Modeling, Components and Demonstrations
3:00 PM–5:36 PM,
Wednesday, March 6, 2024
Room: 202AB
Sponsoring
Unit:
DQI
Chair: Allen Zang, University of Chicago
Abstract: Q53.00006 : A scalable multi-partite high-dimensional quantum network for high-rate entanglement distribution and secure communications*
4:00 PM–4:12 PM
Presenter:
Murat Can Sarihan
(University of California, Los Angeles)
Authors:
Murat Can Sarihan
(University of California, Los Angeles)
Xiang Cheng
(University of California Los Angeles)
Kai-Chi Chang
(University of California, Los Angeles)
Ariel Shlosberg
(University of Colorado, Boulder)
Cody S Fan
(University of California, Los Angeles)
Graeme Smith
(University of Colorado, Boulder)
Chee Wei Wong
(University of California, Los Angeles)
Compared to similar works using wavelength and time, we obtained a gain in secure key rates over an order of magnitude to two orders of magnitude, up to 16 kbits/s at the source and 3.2 kbits/s at 21 km distance. We achieved a non-binary photon information efficiency of up to 2.137 bits/pair while withstanding a quantum bit error rate of 30%, where the binary protocols are susceptible to bit error rates above 10%. Using the dispersive basis for security measurements, we obtained a Holevo leakage only up to 0.3507 bits/pair. The protocol is robust against noisy channels, while it offers full and simultaneous connectivity among the users using a central entanglement provider. The network can be implemented with commercial telecommunications equipment where each user only needs a single channel and detector to be connected, reducing the cost further. Furthermore, the QKD implementation is also a figure of merit for other quantum communication tasks and can be used for high-fidelity entanglement distribution, superdense coding, teleportation, or distributed quantum computing.
*This work was supported by NSF Grant No: 1741707, 2137984, and Army Research Office Grant No: W911NF-21-2-0214.
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