Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fundamental strings and NS5-branes from unstable D-branes in
  supergravity   By using the non-supersymmetric $p$-brane solutions delocalized in arbitrary
number of transverse directions in type II supergravities, we show how they can
be regarded as interpolating solutions between unstable D$p$-branes (a non-BPS
D-brane or a pair of coincident D-brane-antiD-brane) and fundamental strings
and also between unstable D$p$-branes and NS5-branes. We also show that some of
these solutions can be regarded as interpolating solutions between
NS5/$\bar{\rm NS}$5 and D$p$-branes (for $p \leq 5$). This gives a closed
string description of the tachyon condensation and lends support to the
conjecture that the open string theory on unstable D-branes at the tachyonic
vacuum has soliton solutions describing not only the lower dimensional BPS
D-branes, but also the fundamental strings as well as the NS5-branes.

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The categories of this paper are: adap-org
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The categories of this paper are: bayes-an
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The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
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The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
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The categories of this paper are: eess
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The categories of this paper are: quant-ph
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The categories of this paper are: supr-con
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The categories of this paper are: econ
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The categories of this paper are: nucl-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: math
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The categories of this paper are: acc-phys
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The categories of this paper are: cond-mat
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The categories of this paper are: hep-lat