Experimental quantum-walk revival with a time-dependent coin
Abstract
We demonstrate a quantum walk with time-dependent coin bias. With this technique we realize an experimental single-photon one-dimensional quantum walk with a linearly-ramped time-dependent coin flip operation and thereby demonstrate two periodic revivals of the walker distribution. In our beam-displacer interferometer, the walk corresponds to movement between discretely separated transverse modes of the field serving as lattice sites, and the time-dependent coin flip is effected by implementing a different angle between the optical axis of half-wave plate and the light propagation at each step. Each of the quantum-walk steps required to realize a revival comprises two sequential orthogonal coin-flip operators, with one coin having constant bias and the other coin having a time-dependent ramped coin bias, followed by a conditional translation of the walker.
Keywords
Cite
@article{arxiv.1508.01989,
title = {Experimental quantum-walk revival with a time-dependent coin},
author = {Peng Xue and Rong Zhang and Hao Qin and Xiang Zhan and Zhihao Bian and Jian Li and Barry C. Sanders},
journal= {arXiv preprint arXiv:1508.01989},
year = {2015}
}