Optical Lattice Polarization Effects on Hyperpolarizability of Atomic Clock Transitions

Details Optical Lattice Polarization Effects on Hyperpolarizability of Atomic Clock Transitions Optical Lattice Polarization Effects on Hyperpolarizability of Atomic Clock Transitions

2006-06-26

arxiv.org/abs/physics/0606214v2

Physics

Atomic Physics

4 pages, RevTeX4, 2 eps figs

Scientific paper

10.1103/PhysRevLett.97.173601

The light-induced frequency shift due to the hyperpolarizability (i.e. terms of second-order in intensity) is studied for a forbidden optical transition, $J$=0$\to$$J$=0. A simple universal dependence on the field ellipticity is obtained. This result allows minimization of the second-order light shift with respect to the field polarization for optical lattices operating at a magic wavelength (at which the first-order shift vanishes). We show the possibility for the existence of a magic elliptical polarization, for which the second-order frequency shift vanishes. The optimal polarization of the lattice field can be either linear, circular or magic elliptical. The obtained results could improve the accuracy of lattice-based atomic clocks.

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