Multi-site Integrated Optical Addressing of Trapped Ions

Abstract

One of the most effective ways to advance the performance of quantum computers and quantum sensors is to increase the number of qubits or quantum resources in the system. A major technical challenge that must be solved to realize this goal for trapped-ion systems is scaling the delivery of optical signals to many individual ions. In this paper we demonstrate an approach employing waveguides and multi-mode interferometer splitters to optically address multiple ${}^{171}{\text{Yb}}^{+}$ ions in a surface trap by delivering all wavelengths required for full qubit control. Measurements of hyperfine spectra and Rabi flopping were performed on the E2 clock transition, using integrated waveguides for delivering the light needed for Doppler cooling, state preparation, coherent operations, and detection. We describe the use of splitters to address multiple ions using a single optical input per wavelength and use them to demonstrate simultaneous Rabi flopping on two different transitions occurring at distinct trap sites. This work represents an important step towards the realization of scalable integrated photonics for atomic clocks and trapped-ion quantum information systems.

arXiv comment10 pages, 4 figures (+3 supplementary figures)

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• On-chip 7 GHz acousto-optic modulators for visible wavelengths
• Integrated-Photonics-Based Systems for Polarization-Gradient Cooling of Trapped Ions
• A silicon-based ion trap chip protected from semiconductor charging
• Trapped-ion laser cooling in structured light fields
• Electric Field Distortions in Surface Ion Traps with Integrated Nanophotonics
• Low-Crosstalk, Silicon-Fabricated Optical Waveguides for Laser Delivery to Matter Qubits
• Benchmarking Dual-Polarization Silicon Nitride Photonic Integrated Circuits for Trapped-Ion Quantum Technologies