We propose and demonstrate an atomic qubit based on a cold 85Rb-87Rb isotopic mixture, entangled with a frequency-encoded optical qubit. The interface of an atomic qubit with a single spatial light mode, and the ability to independently address the two atomic qubit states, should provide the basic element of an interferometrically robust quantum network.
Cite
@article{arxiv.quant-ph/0611128,
title = {Dual species matter qubit entangled with light},
author = {S. -Y. Lan and S. D. Jenkins and T. Chaneliere and D. N. Matsukevich and C. J. Campbell and R. Zhao and T. A. B. Kennedy and A. Kuzmich},
journal= {arXiv preprint arXiv:quant-ph/0611128},
year = {2015}
}