30 May 2002 Linear and quadratic Stark effect studies of the Cs ground state using Faraday-Ramsey spectroscopy
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Spin alignment created by optical pumping with linearly polarized resonance radiation in a thermal beam of cesium atoms is allowed to evolve in static electric and/or magnetic fields over a distance of 30 cm and is probed downstream via the paramagnetic Faraday rotation. When scanning the applied fields typical Ramsey fringes are obtained, although no oscillating fields are used. With a suitably chosen field geometry one observes a linear Stark effect, which may be interpreted in terms of the Aharonov- Casher phase shift and which allows to calibrate the electric field. In another geometry the technique can be used to measure the electric tensor polarizability of the Cs ground state. This polarizability is suppressed by 6 or 7 orders of magnitude with respect to the scalar polarizability. The measurement is expected to shine more light on a long standing discrepancy between theory and experiment.
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Ulrich Rasbach, Ulrich Rasbach, Christian Ospelkaus, Christian Ospelkaus, Antoine Weis, Antoine Weis, "Linear and quadratic Stark effect studies of the Cs ground state using Faraday-Ramsey spectroscopy", Proc. SPIE 4749, ICONO 2001: Novel Trends in Nonlinear Laser Spectroscopy and Optical Diagnostics and Lasers in Chemistry, Biophysics, and Biomedicine, (30 May 2002); doi: 10.1117/12.468883; https://doi.org/10.1117/12.468883

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