• Analysis of Polarizability Measurements Made with Atom Interferometry

      Gregoire, Maxwell; Brooks, Nathan; Trubko, Raisa; Cronin, Alexander; Univ Arizona, Dept Phys; Univ Arizona, Coll Opt Sci (MDPI AG, 2016-07-06)
      We present revised measurements of the static electric dipole polarizabilities of K, Rb, and Cs based on atom interferometer experiments presented in [Phys. Rev. A 2015, 92, 052513] but now re-analyzed with new calibrations for the magnitude and geometry of the applied electric field gradient. The resulting polarizability values did not change, but the uncertainties were significantly reduced. Then, we interpret several measurements of alkali metal atomic polarizabilities in terms of atomic oscillator strengths f(ik), Einstein coefficients A(ik), state lifetimes tau(k), transition dipole matrix elements D-ik, line strengths S-ik, and van der Waals C-6 coefficients. Finally, we combine atom interferometer measurements of polarizabilities with independent measurements of lifetimes and C-6 values in order to quantify the residual contribution to polarizability due to all atomic transitions other than the principal ns-np(J) transitions for alkali metal atoms.
    • Decoherence Spectroscopy for Atom Interferometry

      Trubko, Raisa; Cronin, Alexander; Univ Arizona, Coll Opt Sci; Univ Arizona, Dept Phys (MDPI AG, 2016-08-17)
      Decoherence due to photon scattering in an atom interferometer was studied as a function of laser frequency near an atomic resonance. The resulting decoherence (contrast-loss) spectra will be used to calibrate measurements of tune-out wavelengths that are made with the same apparatus. To support this goal, a theoretical model of decoherence spectroscopy is presented here along with experimental tests of this model.