Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum States Allowing Minimum Uncertainty Product of angular position
  and momentum   We provide necessary and sufficient conditions for states to have an
arbitrarily small uncertainty product of the azimuthal angle $\phi $ and its
canonical moment $L_{z}$. We illustrate our results with analytical examples.

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The categories of this paper are: cond-mat
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The categories of this paper are: adap-org
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: cs
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The categories of this paper are: q-alg
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The categories of this paper are: gr-qc
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The categories of this paper are: econ
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The categories of this paper are: acc-phys
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The categories of this paper are: solv-int
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-ex
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The categories of this paper are: nlin
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The categories of this paper are: dg-ga
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The categories of this paper are: astro-ph
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The categories of this paper are: q-fin