We propose a method to improve quantum state transfer in transmission lines. The idea is to localize the information on the last qubit of a transmission line, by dynamically varying the coupling constants between the first and the last pair of qubits. The fidelity of state transfer is higher then in a chain with fixed coupling constants. The effect is stable against small fluctuations in the system parameters.
@article{arxiv.quant-ph/0609235,
title = {Use of dynamical coupling for improved quantum state transfer},
author = {A. O. Lyakhov and C. Bruder},
journal= {arXiv preprint arXiv:quant-ph/0609235},
year = {2009}
}