Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamical Properties in the Bilayer Quantum Hall Ferromagnet   The spectral functions of the pseudospin correlation functions in the bilayer
quantum Hall system at \nu=1 are investigated numerically, where the pseudospin
describes the layer degrees of freedom. In the pseudospin-ferromagnetic phase,
the lowest-energy excitation branch is closely connected with the ground state
through the fluctuations of pseudospin S_y and S_z, and it plays a significant
role on the tunneling properties in this system. For the system with very small
tunneling amplitude and layer separation smaller than the critical one, the
system-size dependence of calculated spectral function A_{y z} suggests the
superfluidity on the tunneling current in the absence of impurities.

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The categories of this paper are: math
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ph
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The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
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The categories of this paper are: physics
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The categories of this paper are: hep-lat
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The categories of this paper are: econ
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The categories of this paper are: hep-ex
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The categories of this paper are: gr-qc
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The categories of this paper are: funct-an
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The categories of this paper are: stat