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

Abstract

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).

8 pages, 6 figures

References in corpus (5)

• Atom Interferometers
• Polarizability measurements in a molecule near-field interferometer
• Measurement of the ac Stark shift with a guided matter-wave interferometer
• Accurate determination of electric-dipole matrix elements in K and Rb from Stark shift measurements
• Dispersion compensation in atom interferometry by a Sagnac phase

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