Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonequilibrium variational-cluster approach to real-time dynamics in the
  Fermi-Hubbard model   The nonequilibrium variational-cluster approach is applied to study the
real-time dynamics of the double occupancy in the one-dimensional Fermi-Hubbard
model after different fast changes of hopping parameters. A simple reference
system, consisting of isolated Hubbard dimers, is used to discuss different
aspects of the numerical implementation of the approach in the general
framework of nonequilibrium self-energy functional theory. Opposed to a direct
solution of the Euler equation, its time derivative is found to serve as
numerically tractable and stable conditional equation to fix the time-dependent
variational parameters.

31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol