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1 September 2015 An ion-cavity interface for quantum networks
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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.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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);


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