TY - JOUR
T1 - Robust quantum state engineering through coherent localization in biased-coin quantum walks
AU - Majury, Helena
AU - Boutari, Joelle
AU - O’Sullivan, Elizabeth
AU - Ferraro, Alessandro
AU - Paternostro, Mauro
PY - 2018/1/5
Y1 - 2018/1/5
N2 - We address the performance of a coin-biased quantum walk as a generator for non-classical position states of the walker. We exploit a phenomenon of coherent localization in the position space - resulting from the choice of small values of the coin parameter and assisted by post-selection - to engineer large-size coherent superposition's of position states of the walker. The protocol that we design appears to be remarkably robust against both the actual value taken by the coin parameter and strong dephasing-like noise acting on the spatial degree of freedom. We finally illustrate a possible linear-optics implementation of our proposal, suitable for both bulk and integrated-optics platforms.
AB - We address the performance of a coin-biased quantum walk as a generator for non-classical position states of the walker. We exploit a phenomenon of coherent localization in the position space - resulting from the choice of small values of the coin parameter and assisted by post-selection - to engineer large-size coherent superposition's of position states of the walker. The protocol that we design appears to be remarkably robust against both the actual value taken by the coin parameter and strong dephasing-like noise acting on the spatial degree of freedom. We finally illustrate a possible linear-optics implementation of our proposal, suitable for both bulk and integrated-optics platforms.
U2 - 10.1140/epjqt/s40507-017-0065-9
DO - 10.1140/epjqt/s40507-017-0065-9
M3 - Article
VL - 5
SP - 1
EP - 12
JO - EPJ Quantum Technology
JF - EPJ Quantum Technology
SN - 2196-0763
IS - 1
ER -