Wormholes supported by a phantom energy

Sushkov, Sergey V.

doi:10.1103/physrevd.71.043520

Cited by 432 publications

(438 citation statements)

References 22 publications

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“…It is also interesting to note that in the limit a → ∞, the volume integral tends to a finite value, i.e., I V = −6r 0 /5. This proves that as in the specific case of phantom [8] and Chaplygin [18] wormholes, one may theoretically construct a wormhole with arbitrarily small amounts of a VDW quintessence fluid. As emphasized in Ref.…”

Section: Vdw Quintessence Traversable Wormholesmentioning

confidence: 89%

“…Therefore, the pressure in the VDW equation of state may be regarded a radial pressure, and the transverse pressure is determined through the Einstein field equations. The justification of this approach may be considered as an extension of the construction of inhomogeneous wormhole spacetimes supported by phantom energy [8]. The latter construction was motivated by the analysis carried out in Ref.…”

Section: Introductionmentioning

confidence: 99%

“…An analogous approach was recently carried out in the presence of phantom energy [8] and the generalized Chaplygin gas [18]. We will show that traversable wormhole solutions may be constructed using the VDW equation of state, which are either asymptotically flat or possess finite dimensions, where the exotic matter is confined to the throat neighborhood.…”

Section: Introductionmentioning

confidence: 99%

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Van der Waals quintessence stars

Lobo

2007

Phys. Rev. D

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The van der Waals quintessence equation of state is an interesting scenario for describing the late universe, and seems to provide a solution to the puzzle of dark energy, without the presence of exotic fluids or modifications of the Friedmann equations. In this work, the construction of inhomogeneous compact spheres supported by a van der Waals equation of state is explored. These relativistic stellar configurations shall be denoted as van der Waals quintessence stars. Despite of the fact that, in a cosmological context, the van der Waals fluid is considered homogeneous, inhomogeneities may arise through gravitational instabilities. Thus, these solutions may possibly originate from density fluctuations in the cosmological background. Two specific classes of solutions, namely, gravastars and traversable wormholes are analyzed. Exact solutions are found, and their respective characteristics and physical properties are further explored.

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Section: Vdw Quintessence Traversable Wormholesmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Van der Waals quintessence stars

Lobo

2007

Phys. Rev. D

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“…[61] explicitly demonstrated that the phantom energy can support the existence of static wormholes. Hence, our observation that the holographic dark energies, when accreting on wormhole, leading to an increase in the wormhole mass in the phantom phase of the universe is in agreement with [61]. Also, the study is in agreement with [18], who showed that accretion of two types of Chaplygin gas onto Morris-Thorne Wormhole lead to increase in wormhole mass in the phantom phase of the universe.…”

Section: Discussionmentioning

confidence: 99%

“…Ref. [61] explicitly demonstrated that the phantom energy can support the existence of static wormholes. Hence, our observation that the holographic dark energies, when accreting on wormhole, leading to an increase in the wormhole mass in the phantom phase of the universe is in agreement with [61].…”

Section: Discussionmentioning

confidence: 99%

Can holographic dark energy increase the mass of the wormhole?

Chattopadhyay¹,

Momeni

Altaibayeva

et al. 2014

Astrophys Space Sci

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In this work, we have studied accretion of dark energy (DE) onto MorrisThorne wormhole with three different forms, namely, holographic dark energy, holographic Ricci dark energy and modified holographic Ricci dark energy . Considering the scale factor in power-law form we have observed that as the holographic dark energy accretes onto wormhole, the mass of the wormhole is decreasing. In the next phase we considered three parameterization schemes that are able to get hold of quintessence as well as phantom phases.Without any choice of scale factor we reconstructed Hubble parameter from conservation equation and dark energy densities and subsequently got the mass of the wormhole separately for accretion of the three dark energy candidates. It was observed that if these dark energies accrete onto the wormhole, then for quintessence stage, wormhole mass decreases up to a certain finite value and then again increases to aggressively during phantom phase of the universe.

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Modeling Wormholes Generated by Dark Matter Galactic Halos in f(R)$f(R)$ Modified Gravity

et al. 2023

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Wormholes (WHs) are hypothetical topologically non‐trivial spacetime structures that can be freely traversed by observers and connect two asymptotic regions or infinities. From the current theoretical development, the prospect of their existence is challenging but cannot be excluded. In this paper, generalized Ellis–Bronikov (GEB) traversable WH geometries for static and spherically symmetric spacetime in the background of gravity is explored. First, the Tsujikawa‐like model and the shape function for the GEB model is considered, which depend on a sequence of simple Lorentzian WHs with two parameters: a free even integer exponent, n, besides the throat radius, r0. One also consider that these WHs are generated by dark matter galactic halos (DMGHs), based on the three most common phenomenological models, viz., Navarro–Frenk–White (NFW), Thomas–Fermi (TF), and pseudo‐isothermal (PI). In this concern, the satisfaction of the energy conditions (ECs) which are dependent on the dark matter (DM) models, viz., dominant energy condition (DEC) and strong energy condition (SEC) and those which are not dependent viz., null energy condition (NEC) and WEC at the WH throat and its neighborhood is investigated. Finally, the presence of exotic matter is confirmed by the violation of the NEC in all cases, revealing the supremacy and physical acceptability to support the existence of the WHs and making them compatible and traversable in Tsujikawa's‐like model.

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Wormholes supported by a phantom energy

Cited by 432 publications

References 22 publications

Van der Waals quintessence stars

Van der Waals quintessence stars

Can holographic dark energy increase the mass of the wormhole?

Modeling Wormholes Generated by Dark Matter Galactic Halos in f(R)$f(R)$ Modified Gravity

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