Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Excitation and transport of bound magnon clusters in frustrated
  ferromagnetic chain   We investigate magnetic excitations and spin transport properties of a
frustrated spin chain with ferromagnetic nearest-neighbor and antiferromagnetic
next-nearest-neighbor exchange couplings in a magnetic field by density-matrix
renormalization group methods. In the field-induced quadrupole and octupole
regimes, the low-energy excitation is governed by two- and three-magnon bound
states, respectively, so that bound magnon clusters would contribute to the
spin transport. We show that spin current correlations decrease when the system
goes from the quadrupole regime into the octupole regime. This indicates that
the spin transport is suppressed in the octupole regime, although bound
three-magnon clusters carry a larger amount of angular momentum than bound
two-magnon clusters.

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The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
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The categories of this paper are: stat
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-lat
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The categories of this paper are: mtrl-th
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
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The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
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The categories of this paper are: hep-th
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The categories of this paper are: comp-gas
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The categories of this paper are: solv-int
10
The categories of this paper are: q-bio