Heating of trapped ions from the quantum ground state

Abstract

We have investigated motional heating of laser-cooled 9Be+ ions held in radio-frequency (Paul) traps. We have measured heating rates in a variety of traps with different geometries, electrode materials, and characteristic sizes. The results show that heating is due to electric-field noise from the trap electrodes which exerts a stochastic fluctuating force on the ion. The scaling of the heating rate with trap size is much stronger than that expected from a spatially uniform noise source on the electrodes (such as Johnson noise from external circuits), indicating that a microscopic uncorrelated noise source on the electrodes (such as fluctuating patch-potential fields) is a more likely candidate for the source of heating.

With minor changes. 24 pages, including 7 figures. Submitted by Phys. Rev. A

References in corpus (2)

• Quantum state engineering on an optical transition and decoherence in a Paul trap
• Loss and heating of particles in small and noisy traps

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