Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Radio frequency spectroscopy of the attractive Hubbard model in a trap   Attractive interaction between fermions can lead to pairing and superfluidity
in an optical lattice. In contrast to the `continuum', on a lattice the trap
induced density variation can generate a non monotonic profile of the pairing
amplitude, and completely modify the spectral signatures of any possible
pseudogap phase. Using a tool that fully captures the inhomogeneity and strong
thermal fluctuations, we demonstrate how the crucial radio frequency signatures
of pairing are `inverted' in a trapped attractive fermion lattice compared to
the traditional continuum case. These features would be central in interpreting
any spectroscopic hint of fermion pairing and superfluidity.

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The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
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The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
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The categories of this paper are: econ
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
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The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph