Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Discretized Thermal Green's Functions   We present a spectral weight conserving formalism for Fermionic thermal
Green's functions that are discretized in imaginary time and thus periodic in
imaginary ("Matsubara") frequency. The formalism requires a generalization of
the Dyson equation and the Baym-Kadanoff-Luttinger-Ward functional for the free
energy. A conformal transformation is used to analytically continue the
periodized Matsubara Green's function to the continuous real axis in a way that
conserves the discontinuity at t=0 of the corresponding real-time Green's
function. For given discretization the method allows numerical Green's function
calculations of very high precision and it appears to give a well controlled
convergent approximation as we decrease the discretization interval. The ideas
are tested on Dynamical Mean Field Theory calculations of the paramagnetic
Hubbard model.

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The categories of this paper are: acc-phys
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The categories of this paper are: astro-ph
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The categories of this paper are: physics
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The categories of this paper are: stat
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The categories of this paper are: bayes-an
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The categories of this paper are: cmp-lg
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The categories of this paper are: adap-org
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The categories of this paper are: funct-an
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The categories of this paper are: quant-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: chao-dyn
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The categories of this paper are: gr-qc
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The categories of this paper are: math
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The categories of this paper are: solv-int
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The categories of this paper are: q-alg
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The categories of this paper are: hep-lat