Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Finite Temperature Description of an Interacting Bose Gas   We derive the equation of state of a Bose gas with contact interactions using
relativistic quantum field theory. The calculation accounts for both thermal
and quantum corrections up to 1-loop order. We work in the
Hartree-Fock-Bogoliubov approximation and follow Yukalov's prescription of
introducing two chemical potentials, one for the condensed phase and another
one for the excited phase, to circumvent the well-known Hohenberg-Martin
dilemma. As a check on the formalism, we take the non-relativistic limit and
reproduce known non-relativistic results. Finally, we translate our results to
the hydrodynamical, two-fluid model for finite-temperature superfluids. Our
results are relevant for the phenomenology of Bose-Einstein Condensate and
superfluid dark matter candidates, as well as the color-flavor locking phase of
quark matter in neutron stars.

21
The categories of this paper are: adap-org
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The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
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The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
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The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
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The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
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The categories of this paper are: eess
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The categories of this paper are: chao-dyn