Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bridging the Gap Between the Transient and the Steady State of a
  Nonequilibrium Quantum System   Many-body quantum systems in nonequilibrium remain one of the frontiers of
many-body physics. While there has been significant advances in describing the
short-time evolution of these systems using a variety of different numerical
algorithms, it has been quite difficult to evolve a system from an equilibrium
state prior to the application of a driving field, to the long-time steady (or
periodically oscillating) state. These dynamics are complex: the retarded
quantities tend to approach their long-time limit much faster than the lesser
(or greater) quantities. Recent work on strongly correlated electrons in DC
electric fields illustrated that the system may evolve through successive
quasi-thermal states obeying an effective fluctuation-dissipation theorem in
time. We demonstrate an extrapolation scheme that uses the short-time transient
calculation to obtain the retarded quantities and to extract how the
lesser/greater quantities vary with time and then extend the numerical
solutions all the way to the steady state, with minimal additional
computational cost. Our approach focuses on extrapolating the electronic
self-energy and then employing that to determine the Green's function and
various experimentally relevant expectation values.

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The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
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The categories of this paper are: cs
17
The categories of this paper are: q-fin
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The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an