Determination of the fine structure constant with atom interferometry and Bloch oscillations
Pushing the Frontiers of Atomic Physics(2008)
摘要
We use Bloch oscillations to transfer coherently many photon momenta to
atoms. Then we can measure accurately the recoil velocity $\hbar k/m$ and
deduce the fine structure constant $\alpha$. The velocity variation due to
Bloch oscillations is measured using atom interferometry. This method yields to
a value of the fine structure constant $\alpha^{-1}= 137.035 999 45 (62)$ with
a relative uncertainty of about $4.5 \times 10^{-9}$.
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关键词
fine structure constant,oscillations
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