Motional Mode Manipulation and AC Zeeman effect in QSCOUT*

The Quantum Scientific Computing Open User Testbed (QSCOUT), a low-level white-box ion-based quantum computing testbed available to the scientific community, explores near term application of quantum algorithms. Through this program, we continue to discover applications and effects that influence the future of ion trap quantum information science.   As one example, the AC Zeeman effect in microfabricated ion traps leads to local variations in the magnetic field depending on the trap geometry and the current in the RF which will have implications for large-scale architecture of ion-based quantum computers or ion clocks. We suggest methods to measure this effect and surface trap designs that mitigate the impact for systems more susceptible to fluctuations [1]. As a second example, we will discuss our work with several user teams towards implementing bosonic gates using the ion chain’s motional degrees of freedom, allowing us to couple fermionic spins to bosons.  We plan to offer access to these bosonic states as a new avenue of control for future user projects.

[1].  M. Ivory, C. D. Nordquist, K. Young, C. W. Hogle, S. M. Clark, M. C. Revelle. Review of Scientific Instruments 95, 093202 (2024).