scholarly journals Instability of wormholes supported by a ghost scalar field: II. Nonlinear evolution

2008 ◽  
Vol 26 (1) ◽  
pp. 015011 ◽  
Author(s):  
J A González ◽  
F S Guzmán ◽  
O Sarbach
Keyword(s):  
Scalar Field ◽  
Nonlinear Evolution ◽  
Ghost Scalar Field

scholarly journals QCD MODIFIED GHOST SCALAR FIELD DARK ENERGY MODELS

2013 ◽  
Vol 22 (05) ◽  
pp. 1350018 ◽  
Author(s):  
K. KARAMI ◽  
S. ASADZADEH ◽  
M. MOUSIVAND ◽  
Z. SAFARI
Keyword(s):  
Dark Energy ◽  
Scalar Field ◽  
Linear Perturbation ◽  
Density Parameter ◽  
Frw Cosmology ◽  
Frw Universe ◽  
Ghost Dark Energy ◽  
Energy Models ◽  
Scalar Field Models ◽  
Ghost Scalar Field

Within the framework of FRW cosmology, we study the QCD modified ghost scalar field models of dark energy (DE) in the presence of both interaction and viscosity. For a spatially nonflat FRW universe containing modified ghost dark energy (MGDE) and dark matter (DM), we obtain the equation of state of MGDE, the deceleration parameter as well as a differential equation governing the MGDE density parameter. We also investigate the growth of structure formation for our model in a linear perturbation regime. Furthermore, we reconstruct both the dynamics and potentials of the quintessence, tachyon, K-essence and dilaton scalar field DE models according to the evolution of the MGDE density.

On the instability of static, spherically symmetric wormholes supported by a ghost scalar field

2008 ◽  
Author(s):  
J. A. González ◽  
F. S. Guzmán ◽  
O. Sarbach ◽  
Alfredo Herrera-Aguilar ◽  
Francisco S. Guzmán Murillo ◽  
...  
Keyword(s):  
Scalar Field ◽  
Spherically Symmetric ◽  
Ghost Scalar Field

scholarly journals Cosmological Evolution of a Ghost Scalar Field

2004 ◽  
Vol 36 (7) ◽  
pp. 1671-1678 ◽  
Author(s):  
Sergey V. Sushkov ◽  
Sung-Won Kim
Keyword(s):  
Scalar Field ◽  
Cosmological Evolution ◽  
Ghost Scalar Field

scholarly journals Instability of charged wormholes supported by a ghost scalar field

2009 ◽  
Vol 80 (2) ◽  
Author(s):  
J. A. González ◽  
F. S. Guzmán ◽  
O. Sarbach
Keyword(s):  
Scalar Field ◽  
Ghost Scalar Field

SPATIALLY FLAT FRW MODELS WITH A NONMINIMALLY COUPLED GHOST SCALAR FIELD AND PERFECT FLUID IN EINSTEIN–CARTAN THEORY

2012 ◽  
Vol 21 (01) ◽  
pp. 1250001 ◽  
Author(s):  
A. M. GALIAKHMETOV
Keyword(s):  
General Relativity ◽  
Scalar Field ◽  
Perfect Fluid ◽  
Analogous Problem ◽  
General Solutions ◽  
Cartan Theory ◽  
Frw Models ◽  
Ghost Scalar Field

Exact general solutions to the Einstein–Cartan equations are obtained for spatially flat Friedmann cosmologies with a nonminimally coupled ghost scalar field and perfect fluid. It is shown that both singular and bouncing models are possible. An analogous problem is investigated in general relativity. Some effects of torsion are elucidated. The role of perfect fluid in the Einstein–Cartan cosmology is discussed.

scholarly journals Linear stability of spherically symmetric and wormhole solutions supported by the sine-Gordon ghost scalar field

2010 ◽  
Vol 82 (4) ◽  
Author(s):  
Vladimir Dzhunushaliev ◽  
Vladimir Folomeev ◽  
Douglas Singleton ◽  
Ratbay Myrzakulov
Keyword(s):  
Scalar Field ◽  
Linear Stability ◽  
Spherically Symmetric ◽  
Ghost Scalar Field

scholarly journals Wormhole solutions with a complex ghost scalar field and their instability

2018 ◽  
Vol 97 (2) ◽  
Author(s):  
Vladimir Dzhunushaliev ◽  
Vladimir Folomeev ◽  
Burkhard Kleihaus ◽  
Jutta Kunz
Keyword(s):  
Scalar Field ◽  
Ghost Scalar Field
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