A Caltech Library Service

Interfacing broadband photonic qubits to on-chip cavity-protected rare-earth ensembles

Zhong, Tian and Kindem, Jonathan M. and Rochman, Jake and Faraon, Andrei (2017) Interfacing broadband photonic qubits to on-chip cavity-protected rare-earth ensembles. Nature Communications, 8 . Art. No. 14107. ISSN 2041-1723. PMCID PMC5241816. doi:10.1038/ncomms14107.

[img] PDF - Published Version
Creative Commons Attribution.

[img] PDF - Submitted Version
See Usage Policy.

[img] PDF (Supplementary figures, supplementary notes and supplementary references) - Supplemental Material
Creative Commons Attribution.

[img] Video (QuickTime) (Supplementary Movie 1 - Cavity transmission spectrum of the 1% Nd:YVO device as the cavity is tuned to atomic ensemble resonance) - Supplemental Material
Creative Commons Attribution.

[img] Video (QuickTime) (Supplementary Movie 2 - Cavity transmission spectrum of the 0.1% Nd:YVO device as the cavity is tuned to atomic ensemble resonance) - Supplemental Material
Creative Commons Attribution.


Use this Persistent URL to link to this item:


Ensembles of solid-state optical emitters enable broadband quantum storage and transduction of photonic qubits, with applications in high-rate quantum networks for secure communications and interconnecting future quantum computers. To transfer quantum states using ensembles, rephasing techniques are used to mitigate fast decoherence resulting from inhomogeneous broadening, but these techniques generally limit the bandwidth, efficiency and active times of the quantum interface. Here, we use a dense ensemble of neodymium rare-earth ions strongly coupled to a nanophotonic resonator to demonstrate a significant cavity protection effect at the single-photon level—a technique to suppress ensemble decoherence due to inhomogeneous broadening. The protected Rabi oscillations between the cavity field and the atomic super-radiant state enable ultra-fast transfer of photonic frequency qubits to the ions (∼50 GHz bandwidth) followed by retrieval with 98.7% fidelity. With the prospect of coupling to other long-lived rare-earth spin states, this technique opens the possibilities for broadband, always-ready quantum memories and fast optical-to-microwave transducers.

Item Type:Article
Related URLs:
URLURL TypeDescription CentralArticle Paper
Zhong, Tian0000-0003-3884-7453
Kindem, Jonathan M.0000-0002-7737-9368
Faraon, Andrei0000-0002-8141-391X
Alternate Title:On-chip storage of broadband photonic qubits in a cavity-protected rare-earth ensemble
Additional Information:© 2017 The Author(s). This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit Received: 15 September 2016; Accepted: 29 November 2016; Published online: 16 January 2017. This work is funded by NSF CAREER 1454607 and AFOSR Quantum Transduction MURI FA9550-15-1-002. Device fabrication was performed in the Kavli Nanoscience Institute with support from Gordon and Betty Moore Foundation. Some equipment funding was provided by NSF Institute for Quantum Information and Matter PHY-1125565 with support from Gordon and Betty Moore Foundation GBMF-12500028. Author Contributions: T.Z. and A.F. conceived and designed the experiments. T.Z. and J.R. fabricated the device. T.Z. and J.M.K. performed the measurements and analysed the data. T.Z. and A.F. wrote the manuscript with input from all authors. The authors declare no competing financial interests.
Group:Institute for Quantum Information and Matter, Kavli Nanoscience Institute
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)FA9550-15-1-002
Gordon and Betty Moore FoundationGBMF-12500028
PubMed Central ID:PMC5241816
Record Number:CaltechAUTHORS:20160430-101206074
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:66565
Deposited By: Joy Painter
Deposited On:01 May 2016 23:37
Last Modified:06 Apr 2022 19:26

Repository Staff Only: item control page