Cooling and control of large planar ion crystals in Penning traps

Penning traps provide a platform for interacting hundreds of qubits in quantum science experiments [1]. Our work suggests that cooling below the Doppler limit of in-plane motion is achievable at experimentally controllable rotation frequencies. Recent studies indicate that in-plane motion, which adversely impacts these experiments [2], can be efficiently cooled by increasing the crystal's rotation frequency [3]. In this talk, we explore control of the crystal's rotation frequency using molecular dynamics simulations of various rotating wall potential geometries and strengths. We examine challenges posed by impurity ion species in experiments and demonstrate how parametric drives can further enhance cooling of in-plane motion. Our results provide insights for quantum science experiments [4,5,6], suggesting pathways for improved cooling and robust control of motional degrees of freedom in large planar Penning trap ion crystals.













[1] C. Monroe, et al., Rev. Mod. Phys. 93, 025001 (2021)

[2] A. Shankar et al. Phys. Rev. A, 10 102 (2020)

[3] W. Johnson, et al. Phys. Rev. A 109 L021102 (2024)

[4] [G. Bohnet, et al.,Sci. 352, 1297 (2016), K. Gilmore, et al. Phys. Rev. Lett. 118, 263602 (2017)]

[5] R. N. Wolf, et al., Phys. Rev. Applied 21, 054067 (2024)

[6] B. J. McMahon, et al., Phys. Rev. Lett. 133, 173201 (2024)