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Published on: March 30, 2017
Fast Photon-Mediated Entanglement of Continuously Cooled Trapped Ions for Quantum Networking
Jameson O'Reilly1, George Toh1, Isabella Goetting1
1Duke Quantum Center, Departments of Electrical and Computer Engineering and Physics, <a href="https://ror.org/00py81415">Duke University</a>, Durham, North Carolina 27708, USA.
Abstract:
We entangle two cotrapped atomic barium ion qubits by collecting single visible photons from each ion through in vacuo 0.8 NA objectives, interfering them through an integrated fiber beam splitter and detecting them in coincidence. This projects the qubits into an entangled Bell state with an observed fidelity lower bound of F>94%. We also introduce an ytterbium ion for sympathetic cooling to remove the need for recooling interruptions and achieve a continuous entanglement rate of 250 s^{-1}.

