Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamical effects on superconductivity in BCS-BEC crossover   We investigate the dynamical effects of pairing interaction on
superconductivity in BCS-BEC crossover by studying the Holstein model at
half-filling where the electron-phonon coupling $g$ controls the crossover. The
dynamical mean-field theory was employed in combination with the numerical
renormalization group technique. The dynamical effects induce distinct features
such as absenceof the dispersion back-bending of Bogoliubov quasi-particles,
non-monotonous coupling dependence of the pairing gap, and the soft phonon
spectrum due to the Goldstone mode of local pair phase fluctuations. Also
interesting is the maximum critical temperature being at the normal state phase
boundary. Some of these features have intriguing similarities with the recent
observations in the FeSe$_{1-x}$S$_x$ and Fe$_{1+y}$Se$_x$Te$_{1-x}$
iron-chalcogenides in the BCS-BEC crossover.

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The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph