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Precision measurement and compensation of optical Stark shifts for an ion-trap quantum processor

H. Haeffner·S. Gulde·M. Riebe·G. Lancaster·C. Becher·J. Eschner·F. Schmidt-Kaler·R. Blatt
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Abstract

Using optical Ramsey interferometry, we precisely measure the laser-induced AC-stark shift on the $S_{1/2}$ -- $D_{5/2}$ "quantum bit" transition near 729 nm in a single trapped $^{40}$Ca$^+$ ion. We cancel this shift using an additional laser field. This technique is of particular importance for the implementation of quantum information processing with cold trapped ions. As a simple application we measure the atomic phase evolution during a $n \times 2\pi$ rotation of the quantum bit.

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H. Haeffner, S. Gulde, M. Riebe, G. Lancaster, C. Becher, J. Eschner, F. Schmidt-Kaler, R. Blatt. 2002-12-09. Precision measurement and compensation of optical Stark shifts for an ion-trap quantum processor. https://doi.org/10.1103/physrevlett.90.143602

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