Quantum switching for unknown multi-particle states

Quantum switching network will play an important role in the field of quantum communication. We propose a new quantum switching scheme where not only the classical data and the unknown quantum state of one particle but also the multi-particle state can be transferred. Moreover, a centralized restoration scheme is used to reduce the switching time for transferring quantum packets containing such unknown multi-particle quantum states. The results demonstrate that we can directly route a multi-particle entanglement packet to its corresponding output ports and further reduce the communication time with the help of centralized restoration scheme.