Ground-state cooling of a trapped ion using long-wavelength radiation

Abstract

We demonstrate ground-state cooling of a trapped ion using radio-frequency (RF) radiation. This is a powerful tool for the implementation of quantum operations, where RF or microwave radiation instead of lasers is used for motional quantum state engineering. We measure a mean phonon number of $\overline{n}=0.13(4)$ after sideband cooling, corresponding to a ground-state occupation probability of 88(7)\%. After preparing in the vibrational ground state, we demonstrate motional state engineering by driving Rabi oscillations between the n=0 and n=1 Fock states. We also use the ability to ground-state cool to accurately measure the motional heating rate and report a reduction by almost two orders of magnitude compared to our previously measured result, which we attribute to carefully eliminating sources of electrical noise in the system.

arXiv commentTo be published in PRL

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• Generation of high-fidelity quantum control methods for multi-level systems
• Coherent fluctuation relations: from the abstract to the concrete
• Pulsed Dynamical Decoupling for Fast and Robust Two-Qubit Gates on Trapped Ions
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• Hybrid Microwave Radiation Patterns for High-Fidelity Quantum Gates with Trapped Ions
• Phase-adaptive dynamical decoupling methods for robust spin-spin dynamics in trapped ions
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