Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comment on "Fermi-Bose Mixtures near Broad Interspecies Feshbach
  Resonances"   In a recent Letter (Phys. Rev. lett. 105, 195301 (2010)), Song et al.
introduced a new variational approach to treat strong attractive boson-fermion
(BF) correlations in BF atomic mixtures. The proposed theory predicts a first
order phase transition to a condensate of composite BF pairs with center of
mass momentum Q=0 as opposed to a composite fermionic molecular Fermi gas. We
show in this comment that their approach is incorrect and moreover, by
resorting to an exactly solvable model we demonstrate that there cannot be more
than one correlated Q=0 BF pair in complete contradiction with their
conclusions.

18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat