Two-step frequency conversion for connecting distant quantum memories by transmission through an optical fiber
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2018-04-26 |
| Journal | Yokohama National University Repository (Yokohama National University) |
| Authors | Shuhei Tamura, Kohei Ikeda, Kotaro Okamura, Kazumichi Yoshii, Feng-Lei Hong |
| Institutions | Kanagawa University, Japan Science and Technology Agency |
| Citations | 10 |
Abstract
Section titled âAbstractâLong-distance quantum communication requires entanglement between distant quantum memories. For this purpose, photon transmission is necessary to connect the distant memories. Here, for the first time, we develop a two-step frequency conversion process (from a visible wavelength to a telecommunication wavelength and back) involving the use of independent two-frequency conversion media where the target quantum memories are nitrogen-vacancy centers in diamonds (with an emission/absorption wavelength of 637.2 nm), and experimentally characterize the performance of this process acting on light from an attenuated CW laser. A total conversion efficiency of approximately 7% is achieved. The noise generated in the frequency conversion processes is measured, and the signal-to-noise ratio is estimated for a single photon signal emitted by a nitrogen-vacancy (NV) center. The developed frequency conversion system has future applications via transmission through a long optical fiber channel at a telecommunication wavelength for a quantum repeater network.
Tech Support
Section titled âTech SupportâOriginal Source
Section titled âOriginal Sourceâ- DOI: None