Dynamics of axialized laser-cooled ions in a Penning trap

Abstract

We report the experimental characterization of axialization - a method of reducing the magnetron motion of a small number of ions stored in a Penning trap. This is an important step in the investigation of the suitability of Penning traps for quantum information processing. The magnetron motion was coupled to the laser-cooled modified cyclotron motion by the application of a near-resonant oscillating quadrupole potential (the "axialization drive"). Measurement of cooling rates of the radial motions of the ions showed an order-of-magnitude increase in the damping rate of the magnetron motion with the axialization drive applied. The experimental results are in good qualitative agreement with a recent theoretical study. In particular, a classical avoided crossing was observed in the motional frequencies as the axialization drive frequency was swept through the optimum value, proving that axialization is indeed a resonant effect.

8 pages, 9 figures

References in corpus (7)

• Scalable multi-particle entanglement of trapped ions
• Process tomography of ion trap quantum gates
• Entanglement of Trapped-Ion Clock States
• Quantum Manipulation of Trapped Ions in Two Dimensional Coulomb Crystals
• Deterministic entanglement and tomography of ion spin qubits
• Wigner crystals of ions as quantum hard drives
• Laser cooling in the Penning trap: an analytical model for cooling rates in the presence of an axializing field

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• Population dynamics in sideband cooling of trapped ions outside the Lamb-Dicke regime
• Optical stimulated-Raman sideband spectroscopy of a single ${}^9$Be${}^{+}$ ion in a Penning trap
• Equilibration of the planar modes of ultracold two dimensional ion crystals in a Penning trap
• Rapid cooling of the in-plane motion of two-dimensional ion crystals in a Penning trap to millikelvin temperatures
• Efficient Three-Dimensional Sub-Doppler Cooling of ${}^{40}$Ca${}^{+}$ in a Penning Trap