Quantum Key Distribution: Photons, Data Rates, Fibers

Research team from the Technical University of Denmark achieves multi-fold increase in quantum encryption key bitrates. From their earlier research, the team’s work “achieved low and stable quantum bit error rate” – a key challenge in quantum computing research and development. The team developed protocols maximizing multi-core optic fiber; in turn, they accomplished encoding greater amounts of information thus improving quantum key distribution throughput rates. Continued progress based on single-photon arrays is expected to produce improved data-rate through efficient protocols and scalable processes. Research has also continued into photon-pair generation with multi-mode “fiber optics and four-wave mixing.” Photon-pair generation has direct application to quantum communications.

“Experimental setup: BPF: bandpass filter, SMF: single-mode fiber SI-FMF step-index few-mode fiber, BSF: bandstop filter, DM dichroic mirror, M: mirror, SPDs: single-photon detector. Inserted images show the idler in the LP01 mode, the signal in the LP02 mode, and the pump in a combination of the LP01 and LP02 modes.” (Image courtesy Technical University of Denmark under CC by 4.0)

Reference is found here at STRN… The original work is found at npj [PDF]…

See mdpi.com for the May, 2018, study on photon-pair generation in fibers…

Share this article ...

Photon, Quantum Bit (Qubit), Quantum Communications, Quantum Key Distribution (QKD), Technical University of Denmark (DTU)

At The Qubit Report, our mission is to promote knowledge and opinion of quantum computing from the casual reader to the scientifically astute. Because Quantum is Coming.