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On a WKB formula for echoes

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arxiv 1808.06939 v4 pith:2L7THPCG submitted 2018-08-20 gr-qc

On a WKB formula for echoes

classification gr-qc
keywords echoescompacthorizonlesslevelobjectspresencequantumwall
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present an unified approach for the study of idealized gravitational compact objects like wormholes and horizonless stars, here simulated by the presence of boundary conditions at a deeply inner wall. At classical level, namely neglecting quantum effects, the presence of the wall leads to characteristic echoes following the usual ringdown phase, such that it can discriminate black holes from other horizonless, and probably exotic, compact objects. With regard to this issue, an analytical though approximated expression for the complex frequencies of the quasinormal echoes is found and discussed. At quantum level, we show that static wormholes do not radiate.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Testing the nature of dark compact objects: a status report

    gr-qc 2019-04 accept novelty 2.0

    Current and future observations can test whether dark compact objects are Kerr black holes or exotic alternatives, with null results strengthening the black hole paradigm.