Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Excited-state energies and supersymmetric indices   We study multi-soliton states in two-dimensional N=2 supersymmetric theories.
We calculate their energy exactly as a function of mass and volume in the
simplest integrable N=2 theory, the sine-Gordon model at a particular coupling.
These energies are related to the expectation value $I= tr [\exp(in\pi F)
\exp(-H/T)]$, where F is the fermion number. For n=1, this is Witten's index;
for n an odd integer, we argue that $I$ is an index in the sense that it is
independent of all D-term variations.

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The categories of this paper are: stat
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The categories of this paper are: plasm-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: math
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The categories of this paper are: cond-mat
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The categories of this paper are: quant-ph
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The categories of this paper are: solv-int
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The categories of this paper are: math-ph
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The categories of this paper are: eess
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The categories of this paper are: nucl-ex
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The categories of this paper are: physics
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The categories of this paper are: astro-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: ao-sci
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The categories of this paper are: funct-an
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The categories of this paper are: bayes-an