Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fourier Path Integral Monte Carlo Method for the Calculation of the
  Microcanonical Density of States   Using a Hubbard-Stratonovich transformation coupled with Fourier path
integral methods, expressions are derived for the numerical evaluation of the
microcanonical density of states for quantum particles obeying Boltzmann
statistics. A numerical algorithmis suggested to evaluate the quantum density
of states and illustrated on a one-dimensional model system.

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The categories of this paper are: supr-con
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The categories of this paper are: alg-geom
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The categories of this paper are: stat
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ex
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The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
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The categories of this paper are: dg-ga
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The categories of this paper are: eess
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The categories of this paper are: ao-sci
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The categories of this paper are: mtrl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
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The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
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The categories of this paper are: econ