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Conferences > QAO > 2007 > QTuD > QTuD4

171Yb+ single-ion optical frequency standards and search for variations of the fine structure constant

E. Peik, B. Lipphardt, H. Schnatz, I. Sherstov, B. Stein, Chr. Tamm, S. Weyers, and R. Wynands

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Abstract

Recent results on the 688 THz Yb+ single-ion optical frequency standard are presented. The relative uncertainty of absolute frequency measurements of the standard was reduced to 2.0×10−15. We prepare to observe the electric-octupole transition of Yb+ at 642 THz with sub-hertz resolution. Measurements of the frequency ratio between the 688 THz and 642 THz transitions in Yb+ will permit to search for temporal variations of the fine structure constant.

© 2007 Optical Society of America

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