Late-time tail and echoes of Damour-Solodukhin wormholes

Wei-Liang Qian; Qiyuan Pan; Bean Wang; Rui-Hong Yue

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arXiv · 2402.05485

Late-time tail and echoes of Damour-Solodukhin wormholes

Wei-Liang Qian·Qiyuan Pan·Bean Wang·Rui-Hong Yue

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Abstract

Damour-Solodukhin wormholes are intriguing theoretical constructs, closely mimicking many properties of black holes. This study delves into two distinct characteristics of the waveforms emitted from such wormholes, namely, the late-time tails and echoes, which can substantially be used to distinguish its identity. Notably, both features appear in the latter stages of quasinormal oscillations and stem from the singularities of the Green's function. The late-time tail, on the one hand, arises due to the branch cuts in the relevant Green's function. Within the Damour-Solodukhin wormhole paradigm, singularities are present in both ingoing and outgoing waveforms, which entails a generalization of the existing recipe for black hole metrics. On the other hand, the echoes are attributed to a new set of quasinormal poles, supplementing those of the respective black holes, reminiscent of the scenario where the spacetime metric possesses a discontinuity. It is inferred that both features are observationally relevant in distinguishing a wormhole from its black hole counterpart. Moreover, we suggest a potential interplay concerning the late-time evolution between the two mechanisms in question.

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Wei-Liang Qian, Qiyuan Pan, Bean Wang, Rui-Hong Yue. 2024-08-01. Late-time tail and echoes of Damour-Solodukhin wormholes. https://arxiv.org/abs/2402.05485

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