Quasinormal modes of bumblebee wormhole

Oliveira, Rodrigo Proença de; Dantas, D. M.; Santos, Victor; Almeida, C. A. S.

doi:10.1088/1361-6382/ab1873

Cited by 52 publications

(35 citation statements)

References 47 publications

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“…Quasinormal modes of wormholes have been recently studied in a number of papers in the context of possi- ble astrophysical observations, testing wormhole geometry and stability [38][39][40][41][42][43][44][45][46][47]. Here we were interested in the question whether the arbitrarily long-lived quasinormal modes, which exist in the spectra of massive fields in some black-hole backgrounds, are also present in the spectra of wormholes?…”

Section: Discussionmentioning

confidence: 99%

Arbitrarily long-lived quasinormal modes in a wormhole background

2020

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Arbitrarily long lived modes, called quasi-resonances, are known to exist in the spectrum of massive fields for a number of black-hole backgrounds at some discrete values of mass of the field. Here we show that these modes also exist in the background of wormholes, unless a wormhole has a constant red-shift function, that is, tideless in the radial direction. The evidence of quasi-resonances is supported by calculations in the frequency and time domains, which are in a good concordance. At large masses of the field, time-domain profiles of the absolute value of the wave function have peculiar behavior: the long-lived modes dominate in the signal after a long period of power-law tails.

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Section: Discussionmentioning

confidence: 99%

Arbitrarily long-lived quasinormal modes in a wormhole background

2020

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“…Quasinormal modes of the wormholes, connecting two infinities, obey the same boundary conditions in terms of the tortoise coordinate as those for black holes and they were studied in various contexts in [15][16][17][18][19][20][21][22][23][24][25][26][27] An interesting model interpolating between the traversable wormhole and regular black hole was suggested in [1] and extended to the time-dependent case in [2]. Here we would like to see how the transition between the regular black hole and a wormhole via black bounce can look like from the point of view of quasinormal ringing.…”

Section: Introductionmentioning

confidence: 99%

Ringing of the regular black-hole/wormhole transition

Churilova¹,

Stuchlík²

2020

Class. Quantum Grav.

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Recently a simple one-parameter generalization of the Schwarzschild spacetime was suggested by A. M. Visser [JCAP 1902, 042 (2019)] as a toy model describing the regular black hole and traversable wormhole states separated by the border (one-way wormhole) state, depending on the value of the new parameter. Here we will study quasinormal modes of all three states and show that the black-hole/wormhole transition is characterized by echoes, while the memory of the black hole state is kept in the time-domain profile of the wormhole perturbation at the initial stage of the exponential fall off. Calculations of quasinormal modes with the help of the WKB method with Padé expansion and time-domain integration are in a good agreement. An analytical formula for quasinormal modes in the eikonal regime is obtained.

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“…For other studies demonstrating the physical effects (quasinormal modes, thermodynamics, etc.) of the bumblebee field, the reader may refer to [33][34][35][36][37][38][39][40][41][42] and references therein.…”

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confidence: 99%

GUP modified Hawking radiation in bumblebee gravity

Kanzi

Сакалли

2019

Nuclear Physics B

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The effect of Lorentz symmetry breaking (LSB) on the Hawking radiation of Schwarzschildlike black hole found in the bumblebee gravity model (SBHBGM) is studied in the framework of quantum gravity. To this end, we consider Hawking radiation spin-0 (bosons) and spin-1 2 particles (fermions), which go in and out through the event horizon of the SBHBGM. We use the modified Klein-Gordon and Dirac equations, which are obtained from the generalized uncertainty principle (GUP) to show how Hawking radiation is affected by the GUP and LSB. In particular, we reveal that, independent of the spin of the emitted particle, GUP causes a change in the Hawking temperature of the SBHBGM. Furthermore, we compute the semi-analytic greybody factors (for both bosons and fermions) of the SBHBGM. Thus, we reveal that LSB is effective on the greybody factor of the SBHBGM such that its redundancy decreases the value of the greybody factor. Our findings are graphically depicted.

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Quasinormal modes of bumblebee wormhole

Cited by 52 publications

References 47 publications

Arbitrarily long-lived quasinormal modes in a wormhole background

Arbitrarily long-lived quasinormal modes in a wormhole background

Ringing of the regular black-hole/wormhole transition

GUP modified Hawking radiation in bumblebee gravity

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