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.
To do this, Alice announces the result⃗ aof a mapping ai = ( Z, s i ∈ {0, 1}, X, s i = +, and Bob reveals ⃗b
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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.