Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tachyon Condensation on Fuzzy Sphere and Noncommutative Solitons   We study a brane-antibrane system and a non-BPS D-brane in SU(2) WZW model.
We first discuss the tachyon condensation using the vertex operator formalism
and find the generation of codimension two D-branes after the condensation. Our
result is consistent with the recent interpretation that a D2-brane is a bound
state of D0-branes. Then we investigate the world volume effective theory on a
non-BPS D-brane. It becomes a field theory on the ``fuzzy sphere'' when the
level is sent to infinity. The most interesting feature is that there exist the
noncommutative tachyonic solitons and we can identify them with D0-branes. We
also discuss the brane-antibrane system from the world volume point of view and
comment on the relation to the noncommutative version of the index theorem.

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The categories of this paper are: nlin
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The categories of this paper are: q-alg
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The categories of this paper are: econ
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The categories of this paper are: hep-lat
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The categories of this paper are: ao-sci
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The categories of this paper are: adap-org
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The categories of this paper are: q-fin
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The categories of this paper are: funct-an
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The categories of this paper are: supr-con
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: cond-mat