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# Passive scheme with a photon-number-resolving detector for monitoring the untrusted source in a plug-and-play quantum-key-distribution system (Xu2010a)

Source: https://sqout.qudef.com/literature/Xu2010a
Cite as: SQOUT (QuDef), https://sqout.qudef.com/literature/Xu2010a, Xu2010a

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