Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Metastable spin-phase diagrams in antiferromagnetic Bose-Einstein
  condensates   Spinor Bose-Einstein condensates under external magnetic fields exhibit
well-characterized spin domains of its ground state due to spin-dependent
interactions. At low temperatures, collision-induced spin-mixing instabilities
may promote the condensate to dwell into metastable states occurring near the
phase boundaries. In this work, we study theoretically the metastable
spin-phase diagram of a spin-1 antiferromagnetic Bose-Einstein condensate at
zero and finite temperatures. The approach makes use of Hartree-Fock theory and
exploits the symmetry of the Hamiltonian and of the order parameters yielding a
closed system of transcendental equations for the free energy, fully avoiding
the use of selfconsistency. Our results are consistent with recent experiments
and allow us to explain qualitatively the different types of observed quench
dynamics. In addition, we found that similar phenomena should occur in
antiferromagnetic spinor condensates with a sudden change in the temperature.
It is shown also that the increase of temperature induces a traceable shift of
the Ferromagnetic-Polar transition boundary, behavior previously not noticed by
selfconsistent mean-field calculations.

20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th