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Broadband photonic quantum interface based on a cavity-protected rare-earth ensemble

Zhong, Tian and Kindem, Jonathan M. and Rochman, Jake H. and Faraon, Andrei (2017) Broadband photonic quantum interface based on a cavity-protected rare-earth ensemble. In: Advances in Photonics of Quantum Computing, Memory, and Communication X. Proceedings of SPIE. No.10118. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 101180O. ISBN 9781510606777. http://resolver.caltech.edu/CaltechAUTHORS:20180628-152154902

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Abstract

Rare-earth ions doped in crystals are renowned for their excellent coherence properties and large inhomogeneous broadening, which make them ideal for quantum interfaces with broadband photons. These properties have made them one of the leading technologies in quantum optical memories and a promising candidate for optical-to-microwave conversion. To take advantage of the full bandwidth of the rare-earth ensemble, one must overcome the decoherence of a broadband collective excitation due to inhomogeneous broadening. To this end, techniques based on controllable rephasing, such as atomic frequency comb (AFC) or controlled reversible inhomogeneous broadening (CRIB) memories, have been developed with great success. Recently, an alternative method was proposed to suppress the decoherence of an inhomogeneous ensemble via strong coupling to a cavity, a phenomenon called cavity protection. This technique has been demonstrated in the microwave domain with an NV spin ensemble, but has not been demonstrated in the optical domain. Here, we demonstrate cavity protection in the optical domain at the single photon level using an ensemble of rare earths ions coupled to a nanophotonic resonator. The reduction in decoherence due to the cavity-protection effect enables transfer of ultrafast (~50 GHz) frequency qubits into the collective ion excitation and retrieval with 98.7% fidelity. Building on these results to transfer these excitations to long-lived spin states would enable broadband, on-demand quantum memories. Furthermore, this works compliments the work done coupling rare-earths to superconducting resonators in the microwave regime with potential for applications in optical-to-microwave transducers.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.2252976DOIArticle
ORCID:
AuthorORCID
Zhong, Tian0000-0003-3884-7453
Kindem, Jonathan M.0000-0002-7737-9368
Faraon, Andrei0000-0002-8141-391X
Additional Information:© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE).
Record Number:CaltechAUTHORS:20180628-152154902
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20180628-152154902
Official Citation:Tian Zhong, Jonathan M. Kindem, Jake H. Rochman, Andrei Faraon, "Broadband photonic quantum interface based on a cavity-protected rare-earth ensemble (Conference Presentation)", Proc. SPIE 10118, Advances in Photonics of Quantum Computing, Memory, and Communication X, 101180O (2 June 2017); doi: 10.1117/12.2252976; https://doi.org/10.1117/12.2252976
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:87451
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:03 Jul 2018 18:38
Last Modified:12 Jul 2019 16:57

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