低串扰硅制造光波导用于物质量子比特激光输送
量子物理
2026-04-28 v2
摘要
可靠地控制基于物质的量子比特的量子信息需要精确施加 external field，且未被 accounting 的 spatial 串扰会导致相邻量子比特之间的 field 串扰，引起 fidelity 丢失。我们报告了一款由 CMOS foundry 生产的 micro-fabricated 硅氮化物 (Si3N4) 光波导，用于 address 一串八个不等间距的束踪离子，串扰与可扩展的量子信息处理兼容。chip 设计中整合的串扰缓解技术结果为在接近 650 nm 的相邻波导 output 之间测量的光场减少至少 50.8(1.3) dB，以及为 493 nm 和 585 nm 设计的类似行为。650 nm 附近的波导 output 以及 493 nm 附近的 global 激光被用于激光冷却一串八个 barium-138 离子，camera imaged 所产生的 fluorescence 于 493 nm 进行成像。
引用
@article{arxiv.2406.17607,
title = {Low-Crosstalk, Silicon-Fabricated Optical Waveguides for Laser Delivery to Matter Qubits},
author = {Clayton L. Craft and Nicholas J. Barton and Andrew C. Klug and Kenneth Scalzi and Ian Wildemann and Pramod Asagodu and Joseph D. Broz and Nikola L. Porto and Michael Macalik and Anthony Rizzo and Garrett Percevault and Christopher C. Tison and A. Matthew Smith and Michael L. Fanto and James Schneeloch and Erin Sheridan and Dylan Heberle and Andrew Brownell and Vijay S. S. Sundaram and Venkatesh Deenadayalan and Matthew van Niekerk and Evan Manfreda-Schulz and Gregory A. Howland and Stefan F. Preble and Daniel Coleman and Gerald Leake and Alin Antohe and Tuan Vo and Nicholas M. Fahrenkopf and Todd H. Stievater and Kathy-Anne Brickman-Soderberg and Zachary S. Smith and David Hucul},
journal= {arXiv preprint arXiv:2406.17607},
year = {2026}
}
备注
9 pages, 7 figures