Perfect state transfer and efficient quantum routing: A discrete-time quantum-walk approach
Xiang Zhan, Hao Qin, Zhihao Bian, Jian Li, Peng Xue · Physical Review A · 2014
We show that 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 flips and extend this method to the distribution of an arbitrary unknown multiqubit entangled state between every pair of sites in the multidimensional 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.