2016
DOI: 10.1142/s0218271816300172
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From the Flamm–Einstein–Rosen bridge to the modern renaissance of traversable wormholes

Francisco S. N. Lobo

Abstract: We consider the possibility of multiply-connected spacetimes, ranging from the FlammEinstein-Rosen bridge, geons, and the modern renaissance of traversable wormholes. A fundamental property in wormhole physics is the flaring-out condition of the throat, which through the Einstein field equation entails the violation of the null energy condition. In the context of modified theories of gravity, it has also been shown that the normal matter can be imposed to satisfy the energy conditions, and it is the higher ord… Show more

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Cited by 38 publications
(23 citation statements)
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“…We point out that such a correction corresponds to the decomposition over the small parameter kl 1, where l has the sense of a characteristic scale connected to wormholes 3 , which leads to a very strong limit on the existence of microscopic wormholes (i.e., we may admit only the existence of wormholes at scales l 1 < L Pl ; see also analogous estimates in [36,37]). …”
Section: Lorentz Invariance and The Dispersion Relationsmentioning
confidence: 83%
See 2 more Smart Citations
“…We point out that such a correction corresponds to the decomposition over the small parameter kl 1, where l has the sense of a characteristic scale connected to wormholes 3 , which leads to a very strong limit on the existence of microscopic wormholes (i.e., we may admit only the existence of wormholes at scales l 1 < L Pl ; see also analogous estimates in [36,37]). …”
Section: Lorentz Invariance and The Dispersion Relationsmentioning
confidence: 83%
“…which gives 3 We recall that wormholes relate to three basic parameters. These are the density of wormholes n −1/3 , the mean throat size b, and the mean distance between throats d = |R + − R − |.…”
Section: The Diffuse Halomentioning
confidence: 99%
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“…The viability of WH depends on special models, which is still a developing subject, e.g. [25][26][27][28]. Some of the issues might be better understood by performing numerical simulations of binary mergers with WHs.…”
Section: Effect Of the Interval Shiftmentioning
confidence: 99%
“…For a general introduction and developement of the subject see Visser [9]. A more recent review of these developements can be found in Lobo [10].…”
Section: Introductionmentioning
confidence: 99%