Fig. 9: Receiver rates versus signal brightness.
From: Entanglement-assisted capacity regions and protocol designs for quantum multiple-access channels
The dependence on source brightness NS,1 = NS,2 = NS of the EA advantage of the four receivers for two-sender MAC communication under the scenario of: a microwave domain η = 1/2, τ = 0.01, NB = 20; b long wavelength infrared domain η1 = η2 = 1/2, τ = 0.001, NB = 0.1. In the legend s, p refer to “serial” and “parallel”, respectively. The number of modes NR is fixed such that the SNR NRτNS/NB = 0.1 for sender i = 1, 2. We plot R1 for sender 1 under conditions R1/R2 = ∞ (solid) and R1/R2 = 1 (dot-dashed). Note that R1/R2 = 0, ∞ are equivalent up to a swap due to the symmetry between the two senders; and for given R1/R2, \({R}_{2}/{C}_{{\rm{coh}}}^{2}={R}_{1}/{C}_{{\rm{coh}}}^{1}\).
