C-band single photons from a trapped ion via two-stage frequency conversion

• URL: http://arxiv.org/abs/2103.16450v2
• Date: Mon, 28 Feb 2022 23:04:34 GMT
• Title: C-band single photons from a trapped ion via two-stage frequency conversion
• Authors: John Hannegan, Uday Saha, James D. Siverns, Jake Cassell, Edo Waks, Qudsia Quraishi
• Abstract summary: Trapped ions are leading candidates for quantum networking with high-fidelity two-qubit gates, long coherence times, and the ability to readily emit photons entangled with the ion's internal qubit states. These results are an important step towards enabling a long-distance trapped ion quantum internet.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Fiber-based quantum networks require photons at telecommunications wavelengths to interconnect qubits separated by long distances. Trapped ions are leading candidates for quantum networking with high-fidelity two-qubit gates, long coherence times, and the ability to readily emit photons entangled with the ion's internal qubit states. However, trapped ions typically emit photons at wavelengths incompatible with telecommunications fiber. Here, we demonstrate frequency conversion of visible photons, emitted from the S-P dipole transition of a trapped Ba+ ion, into the telecommunications C-band. These results are an important step towards enabling a long-distance trapped ion quantum internet.

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