Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dirac spectrum and the BEC-BCS crossover in QCD at nonzero isospin
  asymmetry   For large isospin asymmetries, perturbation theory predicts the QCD ground
state to be a superfluid phase of $u$ and $\bar{d}$ Cooper pairs. This phase,
which is denoted as the BCS phase, is expected to be smoothly connected to the
standard phase with Bose-Einstein condensation (BEC) of charged pions at
$\mu_I\ge m_\pi/2$ by an analytic crossover. A first hint for the existence of
the BCS phase, which is likely characterised by the presence of both,
deconfinement and charged pion condensation, is coming from the lattice
observation that the deconfinement crossover smoothly penetrates into the BEC
phase. To further scrutinize the existence of the BCS phase, in this
proceedings article we investigate the complex spectrum of the massive Dirac
operator in 2+1-flavor QCD at nonzero temperature and isospin chemical
potential. The spectral density near the origin is related to the BCS gap via a
generalization of the Banks-Casher relation to the case of complex Dirac
eigenvalues (derived for the zero-temperature, high-density limits of QCD at
nonzero isospin chemical potential).

15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph