Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nanometer-scale spatial modulation of an inter-atomic interaction in a
  Bose-Einstein condensate   We demonstrate nanometer-scale spatial control of inter-atomic interactions
in a Bose-Einstein condensate of ytterbium(Yb). A pulsed optical standing wave,
tuned near an optical Feshbach resonance varies the s-wave scattering length
continuously across the standing wave pattern. The modulated mean-field energy
with a spatial period of every 278 nm is monitored by a diffraction pattern in
a time-of-flight image. We observe a wide scattering length control of up to
160 nm. The demonstrated spatial modulation of the scattering length proves
that the high resolution control of atomic interactions is possible.

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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
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The categories of this paper are: math-ph
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The categories of this paper are: eess
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The categories of this paper are: solv-int
2
The categories of this paper are: math
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The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
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The categories of this paper are: stat
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The categories of this paper are: q-alg
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The categories of this paper are: alg-geom
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The categories of this paper are: ao-sci
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The categories of this paper are: chem-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: comp-gas
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The categories of this paper are: atom-ph