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Updated: Mar 8, 2026
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Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
Published on: August 17, 2017
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Ion-photon entanglement and quantum frequency conversion with trapped Ba+ ions.
Applied Optics
|February 4, 2017
Summary
Researchers developed a new method to create entangled ion-photon pairs from trapped barium ions (Ba+), achieving high fidelity for quantum networking. This work enhances quantum communication range and enables hybrid quantum networks.
Area of Science:
- Quantum Information Science
- Atomic Physics
- Quantum Networking
Background:
- Trapped ions offer promising quantum node capabilities, including long lifetimes and photonic qubit generation.
- Quantum networks face challenges with photon propagation distance and the inability for noiseless amplification.
Purpose of the Study:
- To present an improved method for generating high-fidelity ion-photon entanglement using trapped Ba+ ions.
- To explore quantum frequency conversion for extending the reach of quantum communication networks.
Main Methods:
- Utilized a shelving technique to a long-lived D-state in Ba+ ions for enhanced entanglement probability.
- Investigated ion-photon entanglement generation across various numerical apertures of photon collection optics.
- Proposed quantum frequency conversion of emitted photons to telecommunication bands and 780 nm.
Main Results:
- Achieved a projected ion-photon entanglement fidelity of approximately 89%.
- Demonstrated how entanglement fidelity and probability depend on the photon collection optic's numerical aperture.
- Outlined a viable approach for frequency conversion of Ba+ photons.
Conclusions:
- The developed method offers higher entanglement probabilities and fidelity for trapped ion-based quantum nodes.
- Frequency conversion is crucial for enabling long-distance and hybrid quantum networks by interfacing different quantum systems.
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