Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Imaginary-time quantum many-body theory out of equilibrium I: Formal
  equivalence to Keldysh real-time theory and calculation of static properties   We discuss the formal relationship between the real-time Keldysh and
imaginary-time theory for nonequilibrium in quantum dot systems. The latter can
be reformulated using the recently proposed Matsubara voltage approach. We
establish general conditions for correct analytic continuation procedure on
physical observables, and apply the technique to the calculation of static
quantities in steady-state non-equilibrium for a quantum dot subject to a
finite bias voltage and external magnetic field. Limitations of the Matsubara
voltage approach are also pointed out.

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The categories of this paper are: astro-ph
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The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
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The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
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The categories of this paper are: nucl-th
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The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
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The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
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The categories of this paper are: cs
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The categories of this paper are: eess
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The categories of this paper are: gr-qc