Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A one-dimensional liquid of fermions with tunable spin   Correlations in systems with spin degree of freedom are at the heart of
fundamental phenomena, ranging from magnetism to superconductivity. The effects
of correlations depend strongly on dimensionality, a striking example being
one-dimensional (1D) electronic systems, extensively studied theoretically over
the past fifty years. However, the experimental investigation of the role of
spin multiplicity in 1D fermions - and especially for more than two spin
components - is still lacking. Here we report on the realization of 1D,
strongly-correlated liquids of ultracold fermions interacting repulsively
within SU(N) symmetry, with a tunable number N of spin components. We observe
that static and dynamic properties of the system deviate from those of ideal
fermions and, for N>2, from those of a spin-1/2 Luttinger liquid. In the
large-N limit, the system exhibits properties of a bosonic spinless liquid. Our
results provide a testing ground for many-body theories and may lead to the
observation of fundamental 1D effects.

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The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: math-ph
1
The categories of this paper are: cs
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The categories of this paper are: eess
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The categories of this paper are: q-fin
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The categories of this paper are: q-alg
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The categories of this paper are: stat
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an