Direct excitation of the forbidden clock transition in neutral 174Yb atoms confined to an optical lattice

Details Direct excitation of the forbidden clock transition in neutral 174Yb atoms confined to an optical lattice Direct excitation of the forbidden clock transition in neutral 174Yb atoms confined to an optical lattice

2005-12-09

arxiv.org/abs/physics/0512084v2

Physics

Atomic Physics

Submitted to Physics Review Letters

Scientific paper

10.1103/PhysRevLett.96.083002

We report direct single-laser excitation of the strictly forbidden (6s^2)^1S_0 -(6s6p)^3P_0 clock transition in the even 174Yb isotope confined to a 1D optical lattice. A small (~1.2 mT) static magnetic field was used to induce a nonzero electric dipole transition probability between the clock states at 578.42 nm. Narrow resonance linewidths of 20 Hz (FHWM) with high contrast were observed, demonstrating a record neutral-atom resonance quality factor of 2.6x10^13. The previously unknown ac Stark shift-canceling (magic) wavelength was determined to be 759.35+/-0.02 nm. This method for using the metrologically superior even isotope can be easily implemented in current Yb and Sr lattice clocks, and can create new clock possibilities in other alkaline earth-like atoms such as Mg and Ca.

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