Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gravitational wave spectra from strongly supercooled phase transitions   We study gravitational wave (GW) production in strongly supercooled
cosmological phase transitions, taking particular care of models featuring a
complex scalar field with a U$(1)$ symmetric potential. We perform lattice
simulations of two-bubble collisions to properly model the scalar field
gradients, and compute the GW spectrum sourced by them using the thin-wall
approximation in many-bubble simulations. We find that in the U$(1)$ symmetric
case the low-frequency spectrum is $\propto\omega$ whereas for a real scalar
field it is $\propto\omega^3$. In both cases the spectrum decays as
$\omega^{-2}$ at high frequencies.

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The categories of this paper are: patt-sol
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-alg
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The categories of this paper are: alg-geom
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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: solv-int
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The categories of this paper are: hep-th
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The categories of this paper are: eess
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The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
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The categories of this paper are: dg-ga
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The categories of this paper are: cmp-lg
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The categories of this paper are: adap-org
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The categories of this paper are: math
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The categories of this paper are: nlin