Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bound State of Ultracold Fermions in the Spin Imbalanced Normal State   We study a polarized Fermi gas and demonstrate that Fano-Feshbach (FF)
resonances lead to the pairing of fermions and holes into long living massive
bosonic modes (bifermions and biholes), which can be viewed as signatures of a
first order quantum phase transition. These modes, which are neither
conventional Cooper pairs nor closed channel bosonic dimers, have a peculiar
dispersion relation and appear already in the weak coupling limit, i.e. for
large FF detunings. Our result is in accord with claims of Schunck \emph{et
al.} [cond-mat/0702066] that by stabilizing the normal state the population
imbalance still allows effect of s-wave fermionic pairing.

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The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
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The categories of this paper are: cmp-lg
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The categories of this paper are: mtrl-th
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The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
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The categories of this paper are: comp-gas
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The categories of this paper are: nucl-ex
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The categories of this paper are: cs
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The categories of this paper are: solv-int
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The categories of this paper are: hep-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-fin