Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phase diagram for the spin-3/2 quantum ferromagnetic Blume-Capel model
  in a transverse crystal field: an approximation at the mean-field level   We investigate the phase diagram for the spin-$3/2$ ferromagnetic Blume-Capel
model in a transverse crystal field using the standard mean-field approximation
within the framework of Bogoliubov inequality for free energy. We draw a very
rich phase diagram with first- and second-order transition lines; tricritical
and tetracritical points; critical endpoint of order 2 and double critical
endpoint. Additionally, the behaviour of magnetisation as a function of
temperature over a wide range of values of both longitudinal and transverse
crystal fields is also analysed. To the best of our knowledge, this quantum
spin model has only been studied employing an effective field theory, which in
turn was not able to characterise completely the multicritical phenomena in its
phase diagram, because that procedure is not based on free energy. Thus, our
findings on the phase diagram for the present model are novel as they have been
not previously reported.

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The categories of this paper are: astro-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
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The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
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The categories of this paper are: eess
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The categories of this paper are: chem-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-th
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The categories of this paper are: acc-phys
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The categories of this paper are: cs
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The categories of this paper are: chao-dyn
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The categories of this paper are: ao-sci