Inelastic collisions and density-dependent excitation suppression in a ${}^{87}$Sr optical lattice clock

Details Inelastic collisions and density-dependent excitation suppression in a ${}^{87}$Sr optical lattice clock Inelastic collisions and density-dependent excitation suppression in a ${}^{87}$Sr optical lattice clock

2011-08-06

arxiv.org/abs/1108.1431v2

Phys. Rev. A 84, 052716 (2011)

Physics

Atomic Physics

Scientific paper

We observe two-body loss of ${}^3P_0$ ${}^{87}$Sr atoms trapped in a one-dimensional optical lattice. We measure loss rate coefficients for atomic samples between 1 and 6 $\mu$K that are prepared either in a single nuclear-spin-sublevel or with equal populations in two sublevels. The measured temperature and nuclear spin preparation dependence of rate coefficients agree well with calculations and reveal that rate coefficients for distinguishable atoms are only slightly enhanced over those of indistinguishable atoms. We further observe a suppression of excitation and losses during interrogation of the ${}^1S_0$-${}^3P_0$ transition as density increases and Rabi frequency decreases, which suggests the presence of strong interactions in our dynamically driven many-body system.

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