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Phys Rev Lett. 2003 Oct 24;91(17):173005. Epub 2003 Oct 24.

Ultrastable optical clock with neutral atoms in an engineered light shift trap.

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Engineering Research Institute, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan.


An ultrastable optical clock based on neutral atoms trapped in an optical lattice is proposed. Complete control over the light shift is achieved by employing the 5s(2) 1S0-->5s5p 3P0 transition of 87Sr atoms as a "clock transition." Calculations of ac multipole polarizabilities and dipole hyperpolarizabilities for the clock transition indicate that the contribution of the higher-order light shifts can be reduced to less than 1 mHz, allowing for a projected accuracy of better than 10(-17).

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