Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Finite-temperature mean-field approximations for shell model
  Hamiltonians: the code HF-SHELL   We present the code HF-SHELL for solving the self-consistent mean-field
equations for configuration-interaction shell model Hamiltonians in the
proton-neutron formalism. The code can calculate both ground-state and
finite-temperature properties in the Hartree-Fock (HF),
HF+Bardeen-Cooper-Schrieffer (HF+BCS), and the Hartree-Fock-Bogoliubov (HFB)
mean-field approximations. Particle-number projection after variation is
incorporated to reduce the grand-canonical ensemble to the canonical ensemble,
making the code particularly suitable for the calculation of nuclear state
densities. The code does not impose axial symmetry and allows for triaxial
quadrupole deformations. The self-consistency cycle is particularly robust
through the use of the heavy-ball optimization technique and the implementation
of different options to constrain the quadrupole degrees of freedom.

21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
19
The categories of this paper are: eess