Nuclear Spin Effects in Optical Lattice Clocks

Details Nuclear Spin Effects in Optical Lattice Clocks Nuclear Spin Effects in Optical Lattice Clocks

2007-04-06

arxiv.org/abs/0704.0912v2

Phys. Rev. A 76, 022510 (2007).

Physics

Atomic Physics

13 pages, 12 figures, submitted to PRA

Scientific paper

10.1103/PhysRevA.76.022510

We present a detailed experimental and theoretical study of the effect of nuclear spin on the performance of optical lattice clocks. With a state-mixing theory including spin-orbit and hyperfine interactions, we describe the origin of the $^1S_0$-$^3P_0$ clock transition and the differential g-factor between the two clock states for alkaline-earth(-like) atoms, using $^{87}$Sr as an example. Clock frequency shifts due to magnetic and optical fields are discussed with an emphasis on those relating to nuclear structure. An experimental determination of the differential g-factor in $^{87}$Sr is performed and is in good agreement with theory. The magnitude of the tensor light shift on the clock states is also explored experimentally. State specific measurements with controlled nuclear spin polarization are discussed as a method to reduce the nuclear spin-related systematic effects to below 10$^{-17}$ in lattice clocks.

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