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Article: Wormhole geometries in modified teleparallel gravity and the energy conditions

TitleWormhole geometries in modified teleparallel gravity and the energy conditions
Authors
Issue Date2012
PublisherAmerican Physical Society. The Journal's web site is located at http://prd.aps.org
Citation
Physical Review D (Particles, Fields, Gravitation and Cosmology), 2012, v. 85 n. 4, article no. 044033 How to Cite?
AbstractIn this work, we explore the possibility that static and spherically symmetric traversable wormhole geometries are supported by modified teleparallel gravity or f(T) gravity, where T is the torsion scalar. Considering the field equations with an off-diagonal tetrad, a plethora of asymptotically flat exact solutions are found, which satisfy the weak and the null energy conditions at the throat and its vicinity. More specifically, considering T=0, we find the general conditions for a wormhole satisfying the energy conditions at the throat and present specific examples that satisfy the energy conditions throughout the spacetime. As a consistency check, we also verify that in the teleparallel equivalent of general relativity, i.e., f(T)=T, one regains the standard general relativistic field equations for wormhole physics. Furthermore, considering specific choices for the f(T) form and for the redshift and shape functions, several solutions of wormhole geometries are found that satisfy the energy conditions at the throat and its neighborhood. As in their general relativistic counterparts, these f(T) wormhole geometries present far-reaching physical and cosmological implications, such as being theoretically useful as shortcuts in spacetime and for inducing closed timelike curves, possibly violating causality. © 2012 American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/145927
ISSN
2014 Impact Factor: 4.643
2015 SCImago Journal Rankings: 1.882
ISI Accession Number ID
Funding AgencyGrant Number
RGC of the government of the Hong Kong SAR
Fundacao para a Ciencia e TecnologiaPTDC/FIS/102742/2008
CERN/FP/116398/2010
Funding Information:

The work of T. H. is supported by an RGC grant of the government of the Hong Kong SAR. F.S.N.L. acknowledges financial support of the Fundacao para a Ciencia e Tecnologia through the Grants No. PTDC/FIS/102742/2008 and No. CERN/FP/116398/2010.

 

DC FieldValueLanguage
dc.contributor.authorBöhmer, CGen_US
dc.contributor.authorHarko, Ten_US
dc.contributor.authorLobo, FSNen_US
dc.date.accessioned2012-03-27T09:02:10Z-
dc.date.available2012-03-27T09:02:10Z-
dc.date.issued2012en_US
dc.identifier.citationPhysical Review D (Particles, Fields, Gravitation and Cosmology), 2012, v. 85 n. 4, article no. 044033en_US
dc.identifier.issn1550-7998-
dc.identifier.urihttp://hdl.handle.net/10722/145927-
dc.description.abstractIn this work, we explore the possibility that static and spherically symmetric traversable wormhole geometries are supported by modified teleparallel gravity or f(T) gravity, where T is the torsion scalar. Considering the field equations with an off-diagonal tetrad, a plethora of asymptotically flat exact solutions are found, which satisfy the weak and the null energy conditions at the throat and its vicinity. More specifically, considering T=0, we find the general conditions for a wormhole satisfying the energy conditions at the throat and present specific examples that satisfy the energy conditions throughout the spacetime. As a consistency check, we also verify that in the teleparallel equivalent of general relativity, i.e., f(T)=T, one regains the standard general relativistic field equations for wormhole physics. Furthermore, considering specific choices for the f(T) form and for the redshift and shape functions, several solutions of wormhole geometries are found that satisfy the energy conditions at the throat and its neighborhood. As in their general relativistic counterparts, these f(T) wormhole geometries present far-reaching physical and cosmological implications, such as being theoretically useful as shortcuts in spacetime and for inducing closed timelike curves, possibly violating causality. © 2012 American Physical Society.-
dc.languageengen_US
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prd.aps.orgen_US
dc.relation.ispartofPhysical Review D (Particles, Fields, Gravitation and Cosmology)en_US
dc.rightsCreative Commons: Attribution 3.0 Hong Kong Licenseen_US
dc.titleWormhole geometries in modified teleparallel gravity and the energy conditionsen_US
dc.typeArticleen_US
dc.identifier.emailBöhmer, CG: c.boehmer@ucl.ac.uken_US
dc.identifier.emailHarko, T: harko@hkucc.hku.hk-
dc.identifier.authorityHarko, TC=rp01333en_US
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1103/PhysRevD.85.044033-
dc.identifier.scopuseid_2-s2.0-84857765347-
dc.identifier.hkuros199051en_US
dc.identifier.volume85en_US
dc.identifier.issue4, article no. 044033-
dc.identifier.isiWOS:000300243300013-
dc.publisher.placeUnited States-

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