发表机构
Charles University; Osaka University（查理大学; 大阪大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究提出一种3D打印的GHz微波谐振器Paul阱，用于电子约束，通过实验验证的FEM模型预测电子自旋量子比特相干时间可达约10毫秒，适用于量子信息处理。
AI 中文摘要
我们报道了一种3D打印的微波谐振器Paul阱，其工作频率为电子约束所需的GHz频段，同时保持了开放的几何结构，适用于激光访问和离子库仑晶体的成像。该谐振器表现出约1000的中等品质因数，能够在低输入功率下产生大的约束电场幅度，并且尽管存在制造缺陷（我们通过实验对其进行了表征），其性能与有限元方法（FEM）预测结果高度一致。随后，利用经过验证的FEM模型计算了约束区域内的电磁场。这些场分布连同表面粗糙度测量结果被纳入电子自旋量子比特退相干模型，以估算相干时间。我们的分析预测，在运动加热由约翰逊噪声主导的假设下，电子自旋量子比特的相干时间应能达到约10毫秒量级，这使得此类系统对量子信息处理具有相关性。获得相干时间的方法适用于任何电子Paul阱。
英文摘要
We report a 3D-printed microwave-resonator Paul trap that operates at the GHz frequencies required for electron confinement while preserving an open geometry suitable for laser access and imaging ion Coulomb crystals. The resonator exhibits moderate quality factors of approximately 1000, enabling large confining electric-field amplitudes at low input power, and is in good agreement with finite-element-method (FEM) predictions despite manufacturing imperfections, which we experimentally characterize. The validated FEM model is then used to calculate the electromagnetic fields in the trapping region. These field distributions, together with surface-roughness measurements, are incorporated into a model of electron spin-qubit decoherence to estimate the coherence time. Our analysis predicts that electron spin-qubit coherence times on the order of 10 ms should be achievable under the assumption that motional heating is dominated by Johnson noise, making such systems relevant for quantum information processing. The method of obtaining the coherence time is applicable to any electron Paul trap.
Comments14 pages, 6 figures
