Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Mott-Insulator-Aided Detection of Ultra-Narrow Feshbach Resonances   We report on the detection of extremely narrow Feshbach resonances by
employing a Mott-insulating state for cesium atoms in a three-dimensional
optical lattice. The Mott insulator protects the atomic ensemble from high
background three-body losses in a magnetic field region where a broad Efimov
resonance otherwise dominates the atom loss in bulk samples. Our technique
reveals three ultra-narrow and previously unobserved Feshbach resonances in
this region with widths below $\approx 10\,\mu$G, measured via
Landau-Zener-type molecule formation and confirmed by theoretical predictions.
For comparatively broader resonances we find a lattice-induced substructure in
the respective atom-loss feature due to the interplay of tunneling and strong
particle interactions. Our results provide a powerful tool to identify and
characterize narrow scattering resonances, particularly in systems with complex
Feshbach spectra. The observed ultra-narrow Feshbach resonances could be
interesting candidates for precision measurements.

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The categories of this paper are: atom-ph
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The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ex
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
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The categories of this paper are: comp-gas
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The categories of this paper are: stat
10
The categories of this paper are: q-bio
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The categories of this paper are: econ
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The categories of this paper are: eess
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The categories of this paper are: plasm-ph
2
The categories of this paper are: math