Quantum network nodes based on diamond qubits with an efficient nanophotonic interface
| Title: | Quantum network nodes based on diamond qubits with an efficient nanophotonic interface |
|---|---|
| Authors: | 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. |
| Source: | Phys. Rev. Lett. 123, 183602 (2019) |
| Publication Year: | 2019 |
| Collection: | Quantum Physics |
| Subject Terms: | Quantum Physics |
| More Details: | 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 |
| Document Type: | Working Paper |
| DOI: | 10.1103/PhysRevLett.123.183602 |
| Access URL: | http://arxiv.org/abs/1907.13199 |
| Accession Number: | edsarx.1907.13199 |
| Database: | arXiv |
Be the first to leave a comment!