Fig. 1: Experimental results.
From: Practical high-dimensional quantum key distribution protocol over deployed multicore fiber
a Secret key generation rate as a function of the channel loss for the parameters of the implementation. The star represents the achieved generation rate at the field-deployed channel loss. b Long-term stability of the implementation. Each point represents 10 seconds of measurement. While the \({{{{{{{\mathcal{Z}}}}}}}}\) basis shows great stability over time - an indication of slow phase drift in the fiber—the \({{{{{{{\mathcal{X}}}}}}}}\) basis shows moments of high QBER due to vibration at the receiver site.
