Hong-Ou-Mandel visibility between a QKD source's pulses is shown to bound bases imbalance and, via decoy-state BB84, to lower-bound the secret key rate under passive side-channel leakage.
Interference of short optical pulses from independent gain-switched laser diodes for quantum secure communications
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Bounding light source side channels in QKD via Hong-Ou-Mandel interference
Hong-Ou-Mandel visibility between a QKD source's pulses is shown to bound bases imbalance and, via decoy-state BB84, to lower-bound the secret key rate under passive side-channel leakage.