The ability to individually manipulate the increasing number of qubits is one of the many challenges towards scalable quantum information processing with trapped ions. Using micro-mirrors fabricated with micro-electromechanical systems (MEMS) technology, we focus laser beams on individual ions in a linear chain and steer the focal point in two dimensions. We demonstrate sequential single qubit gates on multiple 171Yb+ qubits and characterize the gate performance using quantum state tomography. Our system features negligible crosstalk to neighboring ions (<3×10−4), and switching speed comparable to typical single qubit gate times (< 2 μs).
@article{arxiv.1409.5362,
title = {Individual addressing of trapped $^{171}$Yb$^+$ ion qubits using a MEMS-based beam steering system},
author = {S. Crain and E. Mount and S. Baek and J. Kim},
journal= {arXiv preprint arXiv:1409.5362},
year = {2014}
}