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  Creation of wormholes by quantum tunnelling in modified gravity theories

Battarra, L., Lavrelashvili, G. V., & Lehners, J.-L. (2014). Creation of wormholes by quantum tunnelling in modified gravity theories. Physical Review D, 90: 124015. doi:10.1103/PhysRevD.90.124015.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-7671-5 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-7672-3
Genre: Journal Article

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1407.6026.pdf (Preprint), 4MB
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 Creators:
Battarra, Lorenzo, Author
Lavrelashvili, George V.1, Author              
Lehners, Jean-Luc2, Author              
Affiliations:
1Quantum Gravity and Unified Theories, AEI Golm, MPI for Gravitational Physics, Max Planck Society, escidoc:24014              
2String Cosmology, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, escidoc:1753351              

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Free keywords: High Energy Physics - Theory, hep-th,General Relativity and Quantum Cosmology, gr-qc
 Abstract: We study the process of quantum tunnelling in scalar-tensor theories in which the scalar field is non-minimally coupled to gravity. In these theories gravitational instantons can deviate substantially from sphericity and can in fact develop a neck - a feature prohibited in theories with minimal coupling. Such instantons with necks lead to the materialisation of bubble geometries containing a wormhole region. We clarify the relationship of neck geometries to violations of the null energy condition, and also derive a bound on the size of the neck relative to that of the instanton.

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 Dates: 2014-07-222014-11-062014
 Publication Status: Published in print
 Pages: 15 pages, 7 figures, v2: typos corrected, discussion extended, matches published version
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 Rev. Method: -
 Identifiers: arXiv: 1407.6026
DOI: 10.1103/PhysRevD.90.124015
URI: http://arxiv.org/abs/1407.6026
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Title: Physical Review D
  Other : Phys. Rev. D.
Source Genre: Journal
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Publ. Info: Lancaster, Pa. : American Physical Society
Pages: - Volume / Issue: 90 Sequence Number: 124015 Start / End Page: - Identifier: ISSN: 0556-2821
CoNE: http://pubman.mpdl.mpg.de/cone/journals/resource/111088197762258