Blackbody radiation shift of the 27Al+ 1S0 - 3P0 transition

T. Rosenband; W. M. Itano; P. O. Schmidt; D. B. Hume; J. C. J. Koelemeij; J. C. Bergquist; D. J. Wineland

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Blackbody radiation shift of the 27Al+ 1S0 - 3P0 transition

T. Rosenband·W. M. Itano·P. O. Schmidt·D. B. Hume·J. C. J. Koelemeij·J. C. Bergquist·D. J. Wineland

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Abstract

The differential polarizability, due to near-infrared light at 1126 nm, of the 27Al+ 1S0 -> 3P0 clock transition is measured to be 4πε_0 x (1.6 +/- 0.5) x 10^{-31} m^3. This measurement is combined with experimental oscillator strengths to extrapolate the differential static polarizability of the clock transition as 4πε_0 x (1.5 +/- 0.5) x 10^{-31} m^3. The resulting room temperature blackbody fractional frequency shift of -8(3) x 10^{-18} is the lowest known shift of all atomic transitions under consideration for optical frequency standards. A method is presented to estimate the differential static polarizability of an optical transition, from a differential light shift measurement.

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T. Rosenband, W. M. Itano, P. O. Schmidt, D. B. Hume, J. C. J. Koelemeij, J. C. Bergquist, D. J. Wineland. 2006-12-22. Blackbody radiation shift of the 27Al+ 1S0 - 3P0 transition. https://arxiv.org/abs/physics/0611125

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