A quantum information processing device, based on bulk solid state NMR of the quasi-one dimensional material hydroxyapatite, is proposed following the magnetic resonance force microscopy work of Yamamoto et al (quant-ph/0009122). In a macroscopic sample of hydroxyapatite, our solid state NMR model yields a limit of 10^8 qubits imposed by physics, while development of current technological considerations should allow an upper bound in the range of hundreds to thousands of qubits.
@article{arxiv.quant-ph/0108106,
title = {Perspectives on a Solid State NMR Quantum Computer},
author = {Edward B. Fel'dman and Serge Lacelle},
journal= {arXiv preprint arXiv:quant-ph/0108106},
year = {2007}
}