Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Collective modes of ultracold fermionic alkaline-earth gases with SU(N)
  symmetry   We calculate the collective modes of ultracold trapped alkaline-earth
fermionic atoms, which possess an SU($N$) symmetry of the nuclear spin degree
of freedom, and a controllable $N$, with $N$ as large as $10$. We calculate the
breathing and quadrupole modes of two-dimensional and three-dimensional
harmonically trapped gases in the normal phase. We particularly concentrate on
two-dimensional gases, where the shift is more accessible experimentally, and
the physics has special features. We present results as a function of
temperature, interaction strength, density, and $N$. We include calculations
across the collisionless to hydrodynamic crossover. We assume the gas is
interacting weakly, such that it can be described by a Boltzmann-Vlasov
equation that includes both mean-field terms and the collision integral. We
solve this with an approximate scaling ansatz, taking care in two-dimensions to
preserve the scaling symmetry of the system. We predict the collective mode
frequency shifts and damping, showing that these are measurable in
experimentally relevant regimes. We expect these results to furnish powerful
tools to characterize interactions and the state of alkaline-earth gases, as
well as to lay the foundation for future work, for example on strongly
interacting gases and SU($N$) spin modes.

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The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
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The categories of this paper are: nucl-th
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The categories of this paper are: bayes-an
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The categories of this paper are: ao-sci
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga