424 research outputs found
An ytterbium quantum gas microscope with narrow-line laser cooling
We demonstrate site-resolved imaging of individual bosonic
atoms in a Hubbard-regime two-dimensional optical lattice
with a short lattice constant of 266 nm. To suppress the heating by probe light
with the - transition of the wavelength = 399 nm for
high-resolution imaging and preserve atoms at the same lattice sites during the
fluorescence imaging, we simultaneously cool atoms by additionally applying
narrow-line optical molasses with the - transition of the
wavelength = 556 nm. We achieve a low temperature of $T = 7.4(1.3)\
\mu\mathrm{K}$, corresponding to a mean oscillation quantum number along the
horizontal axes of 0.22(4) during imaging process. We detect on average 200
fluorescence photons from a single atom within 400 ms exposure time, and
estimate the detection fidelity of 87(2)%. The realization of a quantum gas
microscope with enough fidelity for Yb atoms in a Hubbard-regime optical
lattice opens up the possibilities for studying various kinds of quantum
many-body systems such as Bose and Fermi gases, and their mixtures, and also
long-range-interacting systems such as Rydberg states.Comment: 14 pages, 6 figure
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