Design and Characteristic Measurement of Miniature Three-Segment Linear Paul Trap

概要

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We have fabricated a miniature three-segment linear Paul trap with $r_{0}=0.6$ mm and $2Z_{0}=4$ mm. In order to perform quantum-state manipulation of trapped $^{40} \text{Ca}^{+}$ ions, we discuss the required harmonic oscillation frequencies which allow us to perform effective sideband cooling and have measured those that depend on the dimensions of the trap. A laser beam that has a component in the radial direction of the linear trap as well as that propagating along the trap axis has been used to detect the fluorescence spectra of the $4{^{2} S_{1/2}}$–$4{^{2} P_{1/2}}$ transition. We have observed that the profile of the fluorescence spectrum obtained with the side laser beam is markedly different from that obtained with the axial laser beam due to micromotion. By applying additional DC voltages, the micromotion has been compensated, its amplitude has been estimated, and crystallization has been observed for two $^{40} \text{Ca}^{+}$ and four $^{40} \text{Ca}^{+}$ ions.
Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
2005-10-15