Perfect state transfer and efficient quantum routing: a discrete-time   quantum walk approach
  We show a perfect state transfer of an arbitrary unknown two-qubit state can be achieved via a discrete-time quantum walk with various settings of coin flippings, and extend this method to distribution of an arbitrary unknown multi-qubit entangled state between every pair of sites in the multi-dimensional network. Furthermore, we study the routing of quantum information on this network in a quantum walk architecture, which can be used as quantum information processors to communicate between separated qubits. 
Xiang Zhan, Hao Qin, Zhi-hao Bian, Jian Li and Peng Xue
quant-ph