We demonstrate the realization of a quantum register using a string of single neutral atoms which are trapped in an optical dipole trap. The atoms are selectively and coherently manipulated in a magnetic field gradient using microwave radiation. Our addressing scheme operates with a high spatial resolution and qubit rotations on individual atoms are performed with 99% contrast. In a final read-out operation we analyze each individual atomic state. Finally, we have measured the coherence time and identified the predominant dephasing mechanism for our register.
@article{arxiv.quant-ph/0409037,
title = {A neutral atom quantum register},
author = {D. Schrader and I. Dotsenko and M. Khudaverdyan and Y. Miroshnychenko and A. Rauschenbeutel and D. Meschede},
journal= {arXiv preprint arXiv:quant-ph/0409037},
year = {2009}
}