Physics – Quantum Physics
Scientific paper
2000-02-14
Physics
Quantum Physics
With minor changes. 24 pages, including 7 figures. Submitted by Phys. Rev. A
Scientific paper
10.1103/PhysRevA.61.063418
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.
Itano Wayne M.
Kielpinski David
King B. E.
Leibfried Dietrich
Meekhof D. M.
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