Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Algorithmic Matsubara Integration for Hubbard-like models   We present an algorithm to evaluate Matsubara sums for Feynman diagrams
comprised of bare Green's functions with single-band dispersions with local U
Hubbard interaction vertices. The algorithm provides an exact construction of
the analytic result for the frequency integrals of a diagram that can then be
evaluated for all parameters $U$, temperature $T$, chemical potential $\mu$,
external frequencies and internal/external momenta. This method allows for
symbolic analytic continuation of results to the real frequency axis, avoiding
any ill-posed numerical procedure. When combined with diagrammatic Monte-Carlo,
this method can be used to simultaneously evaluate diagrams throughout the
entire $T-U-\mu$ phase space of Hubbard-like models at minimal computational
expense.

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The categories of this paper are: dg-ga
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The categories of this paper are: chem-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: nlin
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The categories of this paper are: acc-phys
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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: funct-an
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The categories of this paper are: patt-sol
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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-th
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The categories of this paper are: math-ph