A two-laser, modulator-free transmitter prepares time-bin QKD states, and a decoy-free three-state protocol is analyzed, giving an estimated secure range near 40 km.
Asa result, they obtain identical bit strings⃗ α= ⃗β of length M ≤ N with high probability
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Modulator-free transmitter for quantum key distribution in metropolitan area networks
A two-laser, modulator-free transmitter prepares time-bin QKD states, and a decoy-free three-state protocol is analyzed, giving an estimated secure range near 40 km.