Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cluster Percolation and Explicit Symmetry Breaking in Spin Models   Many features of spin models can be interpreted in geometrical terms by means
of the properties of well defined clusters of spins. In case of spontaneous
symmetry breaking, the phase transition of models like the q-state Potts model,
O(n), etc., can be equivalently described as a percolation transition of
clusters. We study here the behaviour of such clusters when the presence of an
external field H breaks explicitly the global symmetry of the Hamiltonian of
the theory. We find that these clusters have still some interesting
relationships with thermal features of the model.

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The categories of this paper are: eess
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The categories of this paper are: hep-th
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The categories of this paper are: atom-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: chem-ph
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The categories of this paper are: cs
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The categories of this paper are: nucl-ex
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The categories of this paper are: nlin
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The categories of this paper are: solv-int
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The categories of this paper are: bayes-an
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The categories of this paper are: stat
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The categories of this paper are: comp-gas
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The categories of this paper are: funct-an
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The categories of this paper are: q-fin
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The categories of this paper are: adap-org
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The categories of this paper are: econ