Expanding and nonexpanding conformal wormholes, in scalar-tensor theory
International Journal of Modern Physics D, cilt.24, sa.8, 2015 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Derleme
- Cilt numarası: 24 Sayı: 8
- Basım Tarihi: 2015
- Doi Numarası: 10.1142/s0218271815500649
- Dergi Adı: International Journal of Modern Physics D
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Anahtar Kelimeler: anisotropic fluid, big rip singularity, Casimir effect for macroscopic systems, Scalar-tensor theories, spherically symmetry, wormholes
- Maltepe Üniversitesi Adresli: Hayır
Özet
We study spherically symmetric spacetime with anisotropic fluid in the scalar-tensor theory of gravity based on Lyra geometry. We suggest two different solutions of field equations for the theory by using Casimir effect. Obtained static and nonstatic solutions are similar to nonexpanding Lorentzian wormhole and expanding FRW-type wormhole, respectively. Furthermore, we study singularities of obtained solutions. We emphasize whether the expanding and nonexpanding wormholes conform with Big Rip or Big Crunch scenarios. Also, physical and geometrical properties of the solutions have been discussed.