[2406.17607] Low-Crosstalk, Silicon-Fabricated Optical Waveguides for Laser Delivery to Matter Qubits Skip to main content Search Submit Donate Log in Search arXiv Press Enter to search · Advanced search Quantum Physics arXiv:2406.17607 (quant-ph) [Submitted on 25 Jun 2024 ( v1 ), last revised 27 Jun 2024 (this version, v2)] Title: Low-Crosstalk, Silicon-Fabricated Optical Waveguides for Laser Delivery to Matter Qubits Authors: Clayton L. Craft , Nicholas J. Barton , Andrew C. Klug , Kenneth Scalzi , Ian Wildemann , Pramod Asagodu , Joseph D. Broz , Nikola L. Porto , Michael Macalik , Anthony Rizzo , Garrett Percevault , Christopher C. Tison , A. Matthew Smith , Michael L. Fanto , James Schneeloch , Erin Sheridan , Dylan Heberle , Andrew Brownell , Vijay S.S. Sundaram , Venkatesh Deenadayalan , Matthew van Niekerk , Evan Manfreda-Schulz , Gregory A. Howland , Stefan F. Preble , Daniel Coleman , Gerald Leake , Alin Antohe , Tuan Vo , Nicholas M. Fahrenkopf , Todd H. Stievater , Kathy-Anne Brickman-Soderberg , Zachary S. Smith , David Hucul View a PDF of the paper titled Low-Crosstalk, Silicon-Fabricated Optical Waveguides for Laser Delivery to Matter Qubits, by Clayton L. Craft and 32 other authors View PDF HTML (experimental) Abstract: Reliable control of quantum information in matter-based qubits requires precisely applied external fields, and unaccounted for spatial cross-talk of these fields between adjacent qubits leads to loss of fidelity. We report a CMOS foundry-produced, micro-fabricated silicon nitride (Si3N4) optical waveguide for addressing a chain of eight, unequally-spaced trapped barium ions with crosstalk compatible with scalable quantum information processing. The crosstalk mitigation techniques incorporated into the chip design result in a reduction of the measured optical field by at least 50.8(1.3) dB between adjacent waveguide outputs near 650 nm and similar behavior for devices designed for 493 nm and 585 nm. The waveguide outputs near 650 nm, along with a global laser near 493 nm were used to laser-cool a chain of eight barium-138 ions, and a camera imaged the resulting fluorescence at 493 nm. Comments: 9 pages, 7 figures Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2406.17607 [quant-ph] (or arXiv:2406.17607v2 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2406.17607 Focus to learn more arXiv-issued DOI via DataCite Related DOI : https://doi.org/10.1103/jgks-dss2 Focus to learn more DOI(s) linking to related resources Submission history From: Clayton Craft [ view email ] [v1] Tue, 25 Jun 2024 14:50:52 UTC (9,378 KB) [v2] Thu, 27 Jun 2024 13:56:31 UTC (9,382 KB) Full-text links: Access Paper: View a PDF of the paper titled Low-Crosstalk, Silicon-Fabricated Optical Waveguides for Laser Delivery to Matter Qubits, by Clayton L. 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