An ion-cavity interface for quantum networks

Tracy E. Northup; Bernardo Casabone; Konstantin Friebe; Klemens Schüppert; Florian R. Ong; Moonjoo Lee; Dario Fioretto; Konstantin Ott; Sebastien Garcia; Jakob Reichel; Rainer Blatt

doi:10.1117/12.2189924

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1 September 2015 An ion-cavity interface for quantum networks

Tracy E. Northup, Bernardo Casabone, Konstantin Friebe, Klemens Schüppert, Florian R. Ong, Moonjoo Lee, Dario Fioretto, Konstantin Ott, Sebastien Garcia, Jakob Reichel, Rainer Blatt

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Proceedings Volume 9615, Quantum Communications and Quantum Imaging XIII; 961506 (2015) https://doi.org/10.1117/12.2189924
Event: SPIE Optical Engineering + Applications, 2015, San Diego, California, United States

Abstract

Trapped ions are a promising platform for local quantum information processing. In order to distribute this quantum information over long distances, we can take advantage of optical cavities, which ofier a coherent interface between matter and light, enabling the transfer of quantum information from stationary qubits such as ions onto photons. We demonstrate such an interface by coupling trapped ions to a cavity and have recently shown that a quantum state can be faithfully transferred from a single ion onto a single photon. In particular, this transfer can be improved by taking advantage of a collective effect between multiple ions, namely, superradiant emission into the cavity. In this proof-of-principle experiment, we tune the phase of a two-ion entangled state between sub- and superradiance. The superradiant coupling is then used to enhance the transfer of quantum information onto a photon from a logical qubit encoded in the two ions. Finally, prospects for linking together distant ions in cavities via a quantum network are discussed. Toward this goal, we outline a fiber-based ion-cavity experiment which allows access to the single-ion strong-coupling regime.

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Tracy E. Northup, Bernardo Casabone, Konstantin Friebe, Klemens Schüppert, Florian R. Ong, Moonjoo Lee, Dario Fioretto, Konstantin Ott, Sebastien Garcia, Jakob Reichel, and Rainer Blatt "An ion-cavity interface for quantum networks", Proc. SPIE 9615, Quantum Communications and Quantum Imaging XIII, 961506 (1 September 2015); https://doi.org/10.1117/12.2189924

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