Isotope-selective Ion Trapping via Sympathetic Cooling using a Surface-Electrode Trap with a Hole for Collimated Atomic Loading

Abstract

We developed a surface-electrode ion trap with a square hole measuring $40\mu \mathrm{m}$ for atomic loading. The hole was fabricated using anisotropic etching of a silicon substrate and was designed to minimize potential distortion in the trapping region. By introducing the atomic beam through the hole, we achieved enhanced isotope selectivity and experimentally demonstrated the selective trapping of calcium isotope ions using an atomic oven. We successfully prepared isotope ion pairs directly from the oven via sympathetic cooling at a rate comparable to that achieved using ablation loading. The sympathetic cooling process occurred on the order of a few seconds. We demonstrated the direct generation of an ion chain above the through-hole. This approach can be applied for trapping a wide range of ion species using a remarkably simple experimental setup, making it desirable for several applications such as quantum-charge-coupled-device (QCCD) architectures and precision measurements of isotope shifts.

9 pages, 7 figures. Submitted to Scientific Reports

References in corpus (16)

• An ${}^{27}$Al${}^{+}$ quantum-logic clock with systematic uncertainty below $10^{-18}$
• Demonstration of the trapped-ion quantum-CCD computer architecture
• Heating of trapped ions from the quantum ground state
• A compact ion-trap quantum computing demonstrator
• A Race Track Trapped-Ion Quantum Processor
• Single ion-qubit exceeding one hour coherence time
• Blueprint for a microwave trapped-ion quantum computer
• Scalable ion traps for quantum information processing
• Isotope-selective photo-ionization for calcium ion trapping
• Design, Fabrication, and Experimental Demonstration of Junction Surface Ion Traps
• Engineering of Microfabricated Ion Traps and Integration of Advanced On-Chip Features
• Controlling trapping potentials and stray electric fields in a microfabricated ion trap through design and compensation
• Ball-grid array architecture for microfabricated ion traps
• Part-per-billion measurement of the $4^2{S}_{1/2}\to 3^2{D}_{5/2}$ electric quadrupole transition isotope shifts between ${}^{42,44,48}$Ca${}^{+}$ and ${}^{40}$Ca${}^{+}$
• Sympathetic cooling and detection of a hot trapped ion by a cold one
• Scalable surface ion trap design for magnetic quantum sensing and gradiometry