Scalable ion-photon quantum interface based on integrated diffractive mirrors

Abstract

Quantum networking links quantum processors through remote entanglement for distributed quantum information processing (QIP) and secure long-range communication. Trapped ions are a leading QIP platform, having demonstrated universal small-scale processors and roadmaps for large-scale implementation. Overall rates of ion-photon entanglement generation, essential for remote trapped ion entanglement, are limited by coupling efficiency into single mode fibres5 and scaling to many ions. Here we show a microfabricated trap with integrated diffractive mirrors that couples 4.1(6)% of the fluorescence from a ${}^{174}$Yb${}^{+}$ ion into a single mode fibre, nearly triple the demonstrated bulk optics efficiency. The integrated optic collects 5.8(8)% of the π transition fluorescence, images the ion with sub-wavelength resolution, and couples 71(5)% of the collected light into the fibre. Our technology is suitable for entangling multiple ions in parallel and overcomes mode quality limitations of existing integrated optical interconnects. In addition, the efficiencies are sufficient for fault tolerant QIP.

5 pages, 3 figures, 26 references

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Cited by in corpus (18)

• Trapped-Ion Quantum Computing: Progress and Challenges
• State Readout of a Trapped Ion Qubit Using a Trap-Integrated Superconducting Photon Detector
• Engineering of Microfabricated Ion Traps and Integration of Advanced On-Chip Features
• How to wire a 1000-qubit trapped ion quantum computer
• Dual-Species, Multi-Qubit Logic Primitives for Ca+/Sr+ Trapped-Ion Crystals
• Fluorescence Detection of a Trapped Ion with a Monolithically Integrated Single-Photon-Counting Avalanche Diode
• Quantum interference between photons from an atomic ensemble and a remote atomic ion
• High-Fidelity Ion State Detection Using Trap-Integrated Avalanche Photodiodes
• Fast photon-mediated entanglement of continuously-cooled trapped ions for quantum networking
• Quantum repeaters based on two species trapped ions
• Integrated photonic structures for photon-mediated entanglement of trapped ions
• Coherent control for qubit state readout
• Single Ion Imaging and Fluorescence Collection with a Parabolic Mirror Trap
• Ion-Photonic Frequency Qubit Correlations for Quantum Networks
• Quantifying the role of thermal motion in free-space light-atom interaction
• A Fully Fiber-Integrated Ion Trap for Portable Optical Atomic Clocks
• Doubly-ionized lanthanum as a qubit candidate for quantum networks
• Electric Field Distortions in Surface Ion Traps with Integrated Nanophotonics