Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tachyonic quench in a free bosonic field theory   We present a characterization of a bosonic field theory driven by a free
(Gaussian) tachyonic Hamiltonian. This regime is obtained from a theory
describing two coupled bosonic fields after a regular quench. Relevant physical
quantities such as simple correlators, entanglement entropies, and the mutual
information of disconnected subregions are computed. We show that the causal
structure resembles a critical (massless) quench. For short times, physical
quantities also resemble critical quenches. However, exponential divergences
end up dominating the dynamics in a very characteristic way. This is related to
the fact that the low-frequency modes do not equilibrate. Some applications and
extensions are outlined.

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The categories of this paper are: chem-ph
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The categories of this paper are: adap-org
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The categories of this paper are: alg-geom
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The categories of this paper are: eess
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The categories of this paper are: ao-sci
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The categories of this paper are: nucl-ex
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The categories of this paper are: cs
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The categories of this paper are: mtrl-th
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The categories of this paper are: cond-mat
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The categories of this paper are: dg-ga
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The categories of this paper are: physics
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The categories of this paper are: q-bio
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The categories of this paper are: math
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The categories of this paper are: nucl-th
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The categories of this paper are: math-ph
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The categories of this paper are: nlin