Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Positivity and Dense Matter   We elaborate on previous results concerning the positivity of the Euclidean
path integral measure for low-energy modes in dense fermionic matter. We show
that the sign problem usually associated with fermions is absent if one
considers only low-energy degrees of freedom. We describe a method for
simulating dense QCD on the lattice and give a proof using rigorous
inequalities that the color-flavor locked (CFL) phase is the true vacuum of
three flavor, massless QCD. We also discuss applications to electronic systems
in condensed matter, such as generalized Hubbard models.

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The categories of this paper are: atom-ph
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The categories of this paper are: adap-org
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The categories of this paper are: hep-ex
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The categories of this paper are: math
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The categories of this paper are: gr-qc
3
The categories of this paper are: physics
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The categories of this paper are: supr-con
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The categories of this paper are: cond-mat
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The categories of this paper are: acc-phys
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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: math-ph
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The categories of this paper are: econ
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The categories of this paper are: astro-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: alg-geom