Protocols for long-distance quantum communication with single $^{167}$Er ions
Abstract
We design a quantum repeater architecture using individual Er ions doped into YSiO crystal. This ion is a promising candidate for a repeater protocol because of its long hyperfine coherence time in addition to its ability to emit photons within the telecommunication wavelength range. To distribute entanglement over a long distance, we propose two different swapping gates between nearby ions using the exchange of virtual cavity photons and the electric dipole-dipole interaction. We analyze their expected performance, and discuss their strengths and weaknesses. Then, we show that a post-selection approach can be implemented to improve the gate fidelity of the virtual photon exchange scheme by monitoring cavity emission. Finally, we use our results for the swapping gates to estimate the end-to-end fidelity and distribution rate for the protocol.
Keywords
Cite
@article{arxiv.2004.02998,
title = {Protocols for long-distance quantum communication with single $^{167}$Er ions},
author = {F. Kimiaee Asadi and S. C. Wein and C. Simon},
journal= {arXiv preprint arXiv:2004.02998},
year = {2020}
}
Comments
12 pages, 9 figures. Quantum Science and Technology (2020)