Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pulsed Neutron Spectroscopy of Low Dimensional Magnets: Past, Present,
  and Future   The early 1990s saw the first useful application of pulsed neutron
spectroscopy to the study of excitations in low dimensional magnetic systems,
with Roger Cowley as a key participant in important early experiments. Since
that time the technique has blossomed as a powerful tool utilizing vastly
improved neutron instrumentation coupled with more powerful pulsed sources.
Here we review representative experiments illustrating some of the fascinating
physics that has been revealed in quasi-one and two dimensional systems

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The categories of this paper are: plasm-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: funct-an
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The categories of this paper are: hep-th
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The categories of this paper are: math-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: supr-con
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The categories of this paper are: solv-int
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The categories of this paper are: hep-lat
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The categories of this paper are: nlin
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The categories of this paper are: alg-geom
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The categories of this paper are: eess
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The categories of this paper are: q-fin
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The categories of this paper are: bayes-an
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The categories of this paper are: q-bio
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The categories of this paper are: adap-org