Fig. 3: Key rate optimization via 2D temporal filtering. | npj 2D Materials and Applications

Fig. 3: Key rate optimization via 2D temporal filtering.

From: Atomically-thin single-photon sources for quantum communication

Fig. 3: Key rate optimization via 2D temporal filtering.The alternative text for this image may have been generated using AI.

a Expected secret key rate fraction S∞(Δt, tc) as a function of the acceptance time window Δt and tc. From the experimental results in back-to-back configuration (0 dB loss in the quantum channel) at 0.43Psat and fixed g(2)(0) = 0.134, three different loss scenarios are simulated. Blue circles mark the optimal parameter sets resulting in a maximal secret key rate. b Rate-loss diagram comparing the non-optimized secret key rate (compare Fig. 2c) and optimized case. For each individual loss, the secret key rate was optimized according to (a). Open circles correspond to experimental results using a variable attenuator in the quantum channel.

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