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arXiv · 1411.0738

Direct photonic coupling of a semiconductor quantum dot and a trapped ion

H. M. Meyer·R. Stockill·M. Steiner·C. Le Gall·C. Matthiesen·E. Clarke·A. Ludwig·J. Reichel·M. Atatüre·M. Köhl
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Abstract

Coupling individual quantum systems lies at the heart of building scalable quantum networks. Here, we report the first direct photonic coupling between a semiconductor quantum dot and a trapped ion and we demonstrate that single photons generated by a quantum dot controllably change the internal state of an $\textrm{Yb}^+$ ion. We ameliorate the effect of the sixty-fold mismatch of the radiative linewidths with coherent photon generation and a high-finesse fiber-based optical cavity enhancing the coupling between the single photon and the ion. The transfer of information presented here via the classical correlations between the $σ_z$-projection of the quantum-dot spin and the internal state of the ion provides a promising step towards quantum state-transfer in a hybrid photonic network.

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H. M. Meyer, R. Stockill, M. Steiner, C. Le Gall, C. Matthiesen, E. Clarke, A. Ludwig, J. Reichel, M. Atatüre, M. Köhl. 2014-11-03. Direct photonic coupling of a semiconductor quantum dot and a trapped ion. https://doi.org/10.1103/physrevlett.114.123001

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