Speaker
Description
We present our progress in developing a surface ion trap system designed for quantum information processing with barium ions. Ba⁺ ions are among the most promising qubit candidates due to their long-lived quantum states and visible-wavelength optical transitions, allowing the use of commercial optics and waveguide-based modulators for individual qubit control. Our system features a Sandia National Lab-fabricated surface ion trap with 94 controllable DC electrode channels enabling precise control of the confining potential. The trap is centrally mounted in the vacuum chamber, departing from conventional flange-mounted designs to maximize optical access while maintaining ultra-high vacuum conditions (3×10⁻¹¹ mbar). We have developed specialized methods to prepare both natural abundance and radioactive ¹³³Ba atomic sources and implemented a modular fiber-coupled optical system where multiple wavelengths are combined and delivered via custom designed boards. Our architecture accommodates individual addressing of multiple ion qubits with negligible intensity crosstalk at 1e-4 level. As part of the Open Quantum Design initiative, this system will integrate with a full-stack control system, enabling remote access to the system at various levels of abstraction.
| Keyword-1 | Surface ion trap |
|---|---|
| Keyword-2 | Quantum computing |
| Keyword-3 | Barium ions |
