Fig. 5: The QBA experiment diagram.
From: Fully heterogeneous prepare-and-measure quantum network for the next stage of quantum internet
The blue and red colors emphasize honesty and maliciousness, respectively. The circles represent the user nodes. The thick arrows and thin arrows denote the multicast messages and forward messages, respectively. The depth of the five-node QBA is two. Sub-figure (a) and (b) represent the depth-1 multicast in the two trades, respectively. a depth-1 multicast of the trade one (honest signer). b depth-1 multicast of the trade two (malicious signer). c QDS as the basic unit of a QBA experiment. d depth-2 multicast among the remaining four nodes. There are four multicast rounds in depth-2. We define the four nodes as Ni (i = 0, 1, 2, 3). N0 is the primary node and N0 = B, C, D, F in the four multicast rounds, respectively. N1 to N2 are remained three nodes in each multicast round. e consumption of each QKP in each multicast round (unit: bit). The columns of the table indicate the multicast corresponding to the primary node, and the rows indicate the corresponding QKP.
