Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Mixing of gravitational wave echoes   Gravitational wave (GW) echoes, if they exist, would be a probe to the
near-horizon quantum structure of black hole (BH), which has motivated the
searching for the echo signals in GW data. We point out that the echo
phenomenology related with the potential structure might be not so simple as
expected. In particular, if the near-horizon regime of BH is modelled as a
multiple-barriers filter, the late-time GW ringdown waveform will exhibit the
mixing of echoes, even the superpositions. As a result, the amplitudes of
successive echoes might not drop sequentially.

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The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
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The categories of this paper are: q-alg
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
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The categories of this paper are: chao-dyn
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The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
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The categories of this paper are: nucl-ex
2
The categories of this paper are: math