تقرير
Quantum network nodes based on diamond qubits with an efficient nanophotonic interface
| العنوان: | Quantum network nodes based on diamond qubits with an efficient nanophotonic interface |
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| المؤلفون: | Nguyen, C. T., Sukachev, D. D., Bhaskar, M. K., Machielse, B., Levonian, D. S., Knall, E. N., Stroganov, P., Riedinger, R., Park, H., Lončar, M., Lukin, M. D. |
| المصدر: | Phys. Rev. Lett. 123, 183602 (2019) |
| سنة النشر: | 2019 |
| المجموعة: | Quantum Physics |
| مصطلحات موضوعية: | Quantum Physics |
| الوصف: | Quantum networks require functional nodes consisting of stationary registers with the capability of high-fidelity quantum processing and storage, which efficiently interface with photons propagating in an optical fiber. We report a significant step towards realization of such nodes using a diamond nanocavity with an embedded silicon-vacancy (SiV) color center and a proximal nuclear spin. Specifically, we show that efficient SiV-cavity coupling (with cooperativity $C >30$) provides a nearly-deterministic interface between photons and the electron spin memory, featuring coherence times exceeding one millisecond. Employing coherent microwave control, we demonstrate heralded single photon storage in the long-lived spin memory as well as a universal control over a cavity-coupled two-qubit register consisting of a SiV and a proximal $^{\mathrm{13}}$C nuclear spin with nearly second-long coherence time, laying the groundwork for implementing quantum repeaters. Comment: 6 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.123.183602 |
| URL الوصول: | http://arxiv.org/abs/1907.13199 |
| رقم الأكسشن: | edsarx.1907.13199 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.123.183602 |
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