Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Infinite-time Average of Local Fields in an Integrable Quantum Field
  Theory after a Quantum Quench   The infinite-time average of the expectation values of local fields of any
interacting quantum theory after a global quench process are key quantities for
matching theoretical and experimental results. For quantum integrable field
theories, we show that they can be obtained by an ensemble average that employs
a particular limit of the Form Factors of local fields and quantities extracted
by the Generalized Bethe Ansatz.

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The categories of this paper are: cmp-lg
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The categories of this paper are: chao-dyn
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The categories of this paper are: nucl-ex
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The categories of this paper are: astro-ph
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The categories of this paper are: eess
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The categories of this paper are: gr-qc
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The categories of this paper are: funct-an
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The categories of this paper are: physics
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The categories of this paper are: nlin
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The categories of this paper are: plasm-ph
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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: solv-int
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The categories of this paper are: comp-gas
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The categories of this paper are: patt-sol