Perfect state transfer and efficient quantum routing: a discrete-time quantum walk approach
arXiv:1405.6422 · doi:10.1103/PhysRevA.90.012331
Abstract
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.
6 pages, 2 figures