Low-Crosstalk, Silicon-Fabricated Optical Waveguides for Laser Delivery to Matter Qubits

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 wav...

Full description

Saved in:
Bibliographic Details
Published inarXiv.org
Main Authors Craft, Clayton L, Barton, Nicholas J, Klug, Andrew C, Scalzi, Kenneth, Wildemann, Ian, Asagodu, Pramod, Broz, Joseph D, Porto, Nikola L, Macalik, Michael, Rizzo, Anthony, Garrett Percevault, Tison, Christopher C, Smith, A Matthew, Fanto, Michael L, Schneeloch, James, Sheridan, Erin, Heberle, Dylan, Brownell, Andrew, Sundaram, Vijay S S, Deenadayalan, Venkatesh, Matthew van Niekerk, Manfreda-Schulz, Evan, Howland, Gregory A, Preble, Stefan F, Coleman, Daniel, Leake, Gerald, Antohe, Alin, Vo, Tuan, Fahrenkopf, Nicholas M, Stievater, Todd H, Brickman-Soderberg, Kathy-Anne, Smith, Zachary S, Hucul, David
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 27.06.2024
Subjects
Barium
Data processing
Lasers
Optical waveguides
Quantum phenomena
Qubits (quantum computing)
Silicon nitride
Online AccessGet full text

Cover

More Information
Summary: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.
ISSN:2331-8422