Charged wormholes in f(R,T)-extended theory of gravity

A plane symmetric Bianchi-I model is explored in f (R, T ) gravity, where R is the Ricci scalar and T is the trace of energy-momentum tensor. The solutions are obtained with the consideration of a specific Hubble parameter which yields a constant deceleration parameter. The various evolutionary phases are identified under the constraints obtained for physically viable cosmological scenarios. Although a single (primary) matter source is taken, due to the coupling between matter and f (R, T ) gravity, an additional matter source appears, which mimics a perfect fluid or exotic matter. The solutions are also extended to the case of a scalar field model. The kinematical behavior of the model remains independent of f (R, T ) gravity. The physical behavior of the effective matter also remains the same as in general relativity. It is found that f (R, T ) gravity can be a good alternative to the hypothetical candidates of dark energy to describe the present accelerating expansion of the universe.

show abstract

“…If the coupled matter satisfies the NEC, then from (36) we find that it will satisfy the DEC under the constraints…”

Section: The Behavior Of Coupled Mattermentioning

confidence: 99%

Plane symmetric model in f(R, T) gravity

Singh

Беешам

2020

Eur. Phys. J. Plus

View full text Add to dashboard Cite

show abstract

“…E. Elizalde and M. Khurshudyan [93] investigated traversable wormhole solutions in f (R, T ) gravity by considering the various forms of energy density. Moraes et al [94] studied the charged wormhole solutions in f (R, T ) theory of gravity and found satisfaction of energy conditions. Sharif and Nawazish [95] investigated wormhole solutions for dust and nondust distributions using Noether symmetry approach in f (R, T ) gravity.…”

Section: Introductionmentioning

confidence: 99%

Static traversable wormholes in f(R,T)=R+2αlnT gravity

Godani¹,

Samanta²

2019

Chinese Journal of Physics

View full text Add to dashboard Cite

Traversable wormholes, studied by Morris and Thorne [3] in general relativity, are investigated in this research paper in f (R, T ) gravity by introducing a new form of nonlinear f (R, T ) function. By using this novel function, the Einstein's field equations in f (R, T ) gravity are derived. To obtain the exact wormhole solutions, the relations p t = ωρ and p r = sinh(r)p t , where ρ is the energy density, p r is the radial pressure and p t is the tangential pressure, are used. Other than these relations, two forms of shape function defined in literature are used, and their suitability is examined by exploring the regions of validity of null, weak, strong and dominant energy conditions . Consequently, the radius of the throat or the spherical region, with satisfied energy conditions, is determined and the presence of exotic matter is minimized.

show abstract

“…They are found in nature in a variety of types and colors and have many useful applications. Clays are some of the oldest materials used for healing purposes in traditional medicine [4][5][6][7][8][9][10]. Clay minerals have been used throughout the world for curative and preventive purposes.…”

Section: Introductionmentioning

confidence: 99%

“…Studies on this subject in the literature are scarce, only being found in books containing technical definitions of the chemical composition of clay. Few papers on its therapeutic and aesthetic uses can be found [5,[18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. Papers about clay are dedicated almost exclusively to other areas, forgetting about other possible alternatives of using the clay.…”

Section: Introductionmentioning

confidence: 99%

Characterization of clays from the State of Paraíba, Brazil for aesthetic and medicinal use

Buriti

Silva

et al. 2019

Cerâmica

View full text Add to dashboard Cite

This study aimed to evaluate the potential of clays from the State of Paraíba to be used for medicinal, therapeutic and aesthetic treatments. The samples were characterized by X-ray diffraction, X-ray fluorescence chemical composition, thermogravimetry, differential thermal analysis, laser diffraction granulometric analysis, cation exchange capacity, and antimicrobial activity. Based on the study, it was concluded that the clays from the State of Paraíba had properties similar to those of commercial clay. The antimicrobial evaluation revealed that the samples showed no activity against the three bacterial strains of clinical interest: Staphylococcus epidermidis ATCC 12 228, Staphylococcus aureus ATCC 25 923, and Escherichia coli ATCC 25 922. Finally, it was concluded that the clays studied have the potential for technological applications in medicinal, therapeutic, and aesthetic treatments, and as raw material for obtaining biomaterials, due to their stability and biological safety.Este trabalho teve como objetivo avaliar a potencialidade das argilas do estado da Paraíba, visando suas aplicações em tratamentos medicinais, terapêuticos e estéticos. As amostras das argilas foram caracterizadas pelas técnicas de difração de raios X, composição química por fluorescência de raios X, termogravimetria, análise térmica diferencial, análise granulométrica por difração a laser, capacidade de troca catiônica e atividade antimicrobiana. Com base no estudo, concluiu-se que as argilas do estado da Paraíba apresentaram propriedades similares à argila comercial. A avaliação antimicrobiana revelou que as amostras não apresentaram atividade frente a três cepas bacterianas de interesse clínico: Staphylococcus epidermidis ATCC 12 228, Staphylococcus aureus ATCC 25 923 e Escherichia coli ATCC 25 922. Por fim conclui-se que as argilas estudadas possuem potencial tecnológico para aplicações em tratamentos medicinais, terapêuticos, estéticos e como matéria-prima para obtenção de biomateriais, em virtude da sua estabilidade e segurança biológica. Palavras-chave: argilas, biominerais, caracterização, tratamento medicinal.

show abstract

Charged wormholes in f(R,T)-extended theory of gravity

Cited by 65 publications

References 69 publications

Plane symmetric model in f(R, T) gravity

Plane symmetric model in f(R, T) gravity

Static traversable wormholes in f(R,T)=R+2αlnT gravity

Characterization of clays from the State of Paraíba, Brazil for aesthetic and medicinal use

Contact Info

Product

Resources

About