One-dimensional quantum walks with single-point phase defects
Rong Zhang, Peng Xue, Jason Twamley · Physical Review A · 2014
We observe the localization effect of one-dimensional quantum walks with single-point phase defects. The walker's spread velocity is dramatically suppressed by interference effects due to the phase defect. We show that the localization effect depends on four factors: the value and the position of the phase defect, the parameter of coin flipping, and the initial state of the walker + coin system.