Absolute and ratio measurements of the polarizability of Na, K, and Rb with an atom interferometer

Details Absolute and ratio measurements of the polarizability of Na, K, and Rb with an atom interferometer Absolute and ratio measurements of the polarizability of Na, K, and Rb with an atom interferometer

2010-01-21

arxiv.org/abs/1001.3888v1

Physics

Atomic Physics

8 pages, 6 figures

Scientific paper

We measured the ground state electric dipole polarizability of sodium, potassium, and rubidium using a Mach-Zehnder atom interferometer with an electric field gradient. We find alpha_Na=24.11(2)_stat(18)_sys x 10^-24 cm^3, alpha_K=43.06(14)(33), and alpha_Rb=47.24(12)(42). Since these measurements were all performed in the same apparatus and subject to the same systematic errors we can present polarizability ratios with 0.3% precision. We find alpha_Rb/alpha_Na=1.959(5), alpha_K/alpha_Na=1.786(6), and alpha_Rb/alpha_K=1.097(5). We combine our ratio measurements with the higher precision measurement of sodium polarizability by Ekstrom et al. [Phys. Rev. A 51, 3883 (1995)] to find alpha_K=43.06(21) and alpha_Rb=47.24(21).

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