We examine the speed and fidelity of several protocols for state or single excitation transfer in finite spin chains subject to diagonal and off-diagonal disorder. We find that, for a given chain length and maximal achievable inter-spin exchange (XY) coupling strength, the optimal static spin-coupling protocol, implementing the fastest state transfer between the two ends of the chain, is more susceptible to off-diagonal (XY coupling) disorder, as compared to a much slower but robust adiabatic transfer protocol with time-dependent coupling strengths.
Cite
@article{arxiv.1001.2444,
title = {State transfer in static and dynamic spin chains with disorder},
author = {David Petrosyan and Georgios M. Nikolopoulos and P. Lambropoulos},
journal= {arXiv preprint arXiv:1001.2444},
year = {2010}
}