Demonstration of Non-Orthogonal Pilot Multiplexing for Continuous-Variable Quantum Key Distribution

We propose and experimentally demonstrate non-orthogonal pilot multiplexing for CVQKD, which requires no additional time/frequency/polarization resource whilst effectively reducing receiver’s DSP complexity. $\sim 53.35-\mathrm{Mb} / \mathrm{s}$ average secret key rate over a channel loss of 5 dB is achieved.