Thick brane solutions
- V. Dzhunushaliev, V. Folomeev, M. Minamitsuji
- Physics
- 11 April 2009
This paper gives a comprehensive review on thick brane solutions and related topics. Such models have attracted much attention from many aspects since the birth of the brane world scenario. In many…
Modified gravity from the quantum part of the metric
- V. Dzhunushaliev, V. Folomeev, B. Kleihaus, J. Kunz
- Physics
- 1 December 2013
It is shown that if a metric in quantum gravity can be decomposed as a sum of classical and quantum parts, then Einstein quantum gravity looks approximately like modified gravity with a nonminimal…
Wormhole solutions with a complex ghost scalar field and their instability
- V. Dzhunushaliev, V. Folomeev, B. Kleihaus, J. Kunz
- Mathematics, Physics
- 5 October 2017
We study compact configurations with a nontrivial wormhole-like spacetime topology supported by a complex ghost scalar field with a quartic self-interaction. For this case, we obtain regular…
Dirac stars supported by nonlinear spinor fields
- V. Dzhunushaliev, V. Folomeev
- PhysicsPhysical Review D
- 19 November 2018
We study configurations consisting of a gravitating spinor field $\psi$ with a nonlinearity of the type $\lambda\left(\bar\psi\psi\right)^2$. To ensure spherical symmetry of the configurations, we…
Modified gravity from the nonperturbative quantization of a metric
- V. Dzhunushaliev, V. Folomeev, B. Kleihaus, J. Kunz
- PhysicsEuropean Physical Journal C: Particles and Fields
- 5 January 2015
It is shown that quantum corrections of the quantum fluctuating metric give rise to modified gravity.
Some thick brane solutions in f(R)-gravity
- V. Dzhunushaliev, V. Folomeev, B. Kleihaus, J. Kunz
- Mathematics
- 15 December 2009
The thick brane model is considered in f(R) ∼ Rn gravity. It is shown that regular asymptotically anti-de Sitter solutions exist in some range of values of the parameter n. A peculiar feature of this…
A star harbouring a wormhole at its core
- V. Dzhunushaliev, V. Folomeev, B. Kleihaus, J. Kunz
- Physics, Mathematics
- 22 February 2011
We consider a configuration consisting of a wormhole filled by a perfect fluid. Such a model can be applied to describe stars as well as neutron stars with a nontrivial topology. The presence of a…
Non-singular solutions to Einstein-Klein-Gordon equations with a phantom scalar field
- V. Dzhunushaliev, V. Folomeev, R. Myrzakulov, D. Singleton
- Physics, Mathematics
- 21 May 2008
It is shown that the 4D Einstein-Klein-Gordon equations with a phantom scalar field (a scalar field with a negative sign in front of the kinetic energy term of its Lagrange density) has non-singular,…
Dirac star in the presence of Maxwell and Proca fields
- V. Dzhunushaliev, V. Folomeev
- PhysicsPhysical Review D
- 28 January 2019
We consider configurations consisting of a gravitating nonlinear spinor field $\psi$, with a nonlinearity of the type $\lambda\left(\bar\psi\psi\right)^2$, minimally coupled to Maxwell and Proca…
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