Echoes from phantom wormholes

Hang Liu, Peng Liu, Yunqi Liu, Bin Wang, and Jian-Pin Wu

Phys. Rev. D 103, 024006 – Published 5 January 2021

Abstract

We study the time evolution of the test scalar and electromagnetic fields perturbations in configurations of phantom wormholes surrounded by dark energy with state parameter $ω < - 1$ . We observe obvious signals of echoes reflecting wormholes properties and disclose the physical reasons behind such phenomena. In particular, we find that the dark energy equation of state has a clear imprint in echoes in wave perturbations. When $ω$ approaches the phantom divide $ω = - 1$ from below, the delay time of echoes becomes longer. The echo of gravitational wave is likely to be detected in the near future, and the signature of the dark energy equation of state in the echo spectrum can serve as a local measurement of the dark energy.

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Received 24 July 2020
Accepted 7 December 2020

DOI:https://doi.org/10.1103/PhysRevD.103.024006

Physics Subject Headings (PhySH)

Gravitational waves

Classical black holes Quantum aspects of black holes

Gravitation, Cosmology & Astrophysics

Authors & Affiliations

Hang Liu^1,2,†, Peng Liu^3,‡, Yunqi Liu^2,§, Bin Wang^2,4,∥, and Jian-Pin Wu ^2,*

¹School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
²Center for Gravitation and Cosmology, College of Physical Science and Technology, Yangzhou University, Yangzhou 225009, China
³Department of Physics and Siyuan Laboratory, Jinan University, Guangzhou 510632, China
⁴School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai 200240, China

^*Corresponding author; jianpinwu@yzu.edu.cn
^†hangliu@sjtu.edu.cn
^‡phylp@jnu.edu.cn
^§yunqiliu@yzu.edu.cn
^∥wang_b@sjtu.edu.cn

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Issue

Vol. 103, Iss. 2 — 15 January 2021

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Physical Review D

covering particles, fields, gravitation, and cosmology