Abstract:
Entanglement-based quantum networks hold out the promise of new capabilities for secure communication, distributed quantum computing, and interconnected quantum sensors. However, only a handful of elementary quantum networks have been realized to date. Trapped ions are among the most promising platforms for quantum information science, and I will review the state of the art in linking together trapped-ion quantum computers. Optical cavities provide efficient quantum interfaces between ions and photons, and I will present ongoing work to link two cavity-coupled ion traps in Innsbruck across a 400 m channel, including recent measurements of Hong-Ou-Mandel interference. Finally, we will consider the role that these prototype experiments can play in a systematic blueprint for a quantum internet.
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