We present a technique that dramatically improves the accuracy of adiabatic state transfer for a broad class of realistic Hamiltonians. For some systems, the total error scaling can be quadratically reduced at a fixed maximum transfer rate. These improvements rely only on the judicious choice of the total evolution time. Our technique is error-robust, and hence applicable to existing experiments utilizing adiabatic passage. We give two examples as proofs-of-principle, showing quadratic error reductions for an adiabatic search algorithm and a tunable two-qubit quantum logic gate.
@article{arxiv.1105.6268,
title = {Improved Error-Scaling for Adiabatic Quantum State Transfer},
author = {Nathan Wiebe and Nathan S. Babcock},
journal= {arXiv preprint arXiv:1105.6268},
year = {2012}
}
Comments
10 Pages, 4 figures. Comments are welcome. Version substantially revised to generalize results to cases where several derivatives of the Hamiltonian are zero on the boundary