A wormhole geometry from gravitational collapse

Chakrabarti, Soumya; Kar, Sayan

doi:10.48550/arxiv.2106.14761

Cited by 2 publications

(2 citation statements)

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“…The model then represents a simple conformal gravitational collapse. Models of conformal collapse have been studied in a few recent contributions [369,370]. These models are often considered in the context of analytical investigation of gravitational collapse because of their mathematical simplicity.…”

Section: 23)mentioning

confidence: 99%

Application of the Raychaudhuri Equation in Gravitational Systems

Choudhury¹

2023

Preprint

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hereby declare that this thesis is my own work and, to the best of my knowledge, it neither contains materials previously published or written by any other person, nor has it been submitted for any degree/diploma or any other academic award anywhere before. I have used the originality checking service to prevent inappropriate copying.I also declare that all copyrighted material incorporated into this thesis is in compliance with the Indian Copyright Act, 1957Act, (amended in 2012 and that I have received written permission from the copyright owners for my use of their work. I hereby grant permission to IISER Kolkata to store the thesis in a database which can be accessed by others.

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Section: 23)mentioning

confidence: 99%

Application of the Raychaudhuri Equation in Gravitational Systems

Choudhury¹

2023

Preprint

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“…in the limit of l η → ∞, which has recently been the subject of intensive study [21][22][23][24][25][26][27][28].…”

Section: Generating a Wormhole Solution By A Disformal Transformationmentioning

confidence: 99%

Disformal Transition of a Black Hole to a Wormhole in Scalar-Tensor Horndeski Theory

Chatzifotis,

Papantonopoulos,

Vlachos

2021

Preprint

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We consider disformal transformations in a subclass of Horndeski theory in which a scalar field is kinetically coupled to Einstein tensor. We apply a disformal transformation on a seed hairy black hole solution of this theory and we show that there is a transition of a black hole to a wormhole. We also show that the null energy condition is violated in the wormhole configuration and we study the stability of the wormhole solution by calculating the time evolution of scalar perturbations in this geometry. Contents I. Introduction 1 II. Black Hole Solution with a Scalar Field Kinetically Coupled to Einstein Tensor 2 III. Generating a wormhole solution by a disformal transformation 4 IV. Testing of the energy conditions 6 V. Evolution of scalar perturbations on the wormhole geometry 8 A. Two-Way Wormhole 9 B. One-way Wormhole 10 VI. Conclusions 11 A. Appendix 12 References 13

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A wormhole geometry from gravitational collapse

Cited by 2 publications

References 34 publications

Application of the Raychaudhuri Equation in Gravitational Systems

Application of the Raychaudhuri Equation in Gravitational Systems

Disformal Transition of a Black Hole to a Wormhole in Scalar-Tensor Horndeski Theory

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