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

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arxiv physics/0212040 v1 pith:C7HZ764T submitted 2002-12-09 physics.atom-ph quant-ph

H. Haeffner , S. Gulde , M. Riebe , G. Lancaster , C. Becher , J. Eschner , F. Schmidt-Kaler , R. Blatt This is my paper · ORCID
classification physics.atom-phquant-ph
keywords quantummeasureopticalshifttrappedac-starkadditionalapplication
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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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