Scalable Integration of Long-Lived Quantum Memories into a Photonic Circuit

Scalable Integration of Long-Lived Quantum Memories into a Photonic Circuit

We demonstrate a photonic circuit with integrated long-lived quantum memories. Precharacterized quantum nodes—diamond microwaveguides containing single, stable, negatively charged nitrogen-vacancy centers—are deterministically integrated into low-loss silicon nitride waveguides. These quantum nodes...

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Bibliographic Details
Main Authors: Mouradian, Sara L., Poitras, Carl B., Li, Luozhou, Chen, Edward H., Cardenas, Jaime, Markham, Matthew L., Twitchen, Daniel J., Lipson, Michal, Schroder, Tim, Goldstein, Jordan A., Walsh, Michael P., Englund, Dirk Robert
Other Authors: Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Format: Article
Language:English
Published: American Physical Society 2015
Online Access:http://hdl.handle.net/1721.1/97878
https://orcid.org/0000-0002-4900-741X
https://orcid.org/0000-0002-8751-6629
https://orcid.org/0000-0002-6404-7735
https://orcid.org/0000-0001-9017-0254
https://orcid.org/0000-0002-1196-795X
https://orcid.org/0000-0001-7217-7137
Description
Summary:We demonstrate a photonic circuit with integrated long-lived quantum memories. Precharacterized quantum nodes—diamond microwaveguides containing single, stable, negatively charged nitrogen-vacancy centers—are deterministically integrated into low-loss silicon nitride waveguides. These quantum nodes efficiently couple into the single-mode waveguides with >1  Mcps collected into the waveguide, have narrow single-scan linewidths below 400 MHz, and exhibit long electron spin coherence times up to 120  μs. Our system facilitates the assembly of multiple quantum nodes with preselected properties into a photonic integrated circuit with near unity yield, paving the way towards the scalable fabrication of quantum information processors.

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