Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spectral shift technique for strongly correlated lattice fermions   We present a development of strong-coupling diagrammatic techniques which
relies on integrating out mean-field-like paths prior to conducting the
expansion. This makes it possible to expand around a state with a quasiparticle
spectrum that takes into account all kinetic effects that do not explicitly
depend on nonlocal correlations. These paths contribute most of the kinetic
energy in correlated systems, and so this protocol provides a starting point
for the expansion that more closely resembles the full theory. Comparisons to
existing exact results clearly confirm this.

22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas