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

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 Janis–Newman–Winicour and Wyman Solutions are the Same

1997 ◽  
Vol 12 (27) ◽  
pp. 4831-4835 ◽  
Author(s):  
K. S. Virbhadra
Keyword(s):  
Exact Solution ◽  
Scalar Field ◽  
Total Energy ◽  
Space Time ◽  
Massless Scalar ◽  
Spherically Symmetric ◽  
Scalar Equations

We show that the well-known most general static and spherically symmetric exact solution to the Einstein-massless scalar equations given by Wyman is the same as one found by Janis, Newman and Winicour several years ago. We obtain the energy associated with this space–time and find that the total energy for the case of the purely scalar field is zero.

scholarly journals Extended multi-scalar field theories in $$(1+1)$$ dimensions

2020 ◽  
Vol 80 (12) ◽  
Author(s):  
A. R. Aguirre ◽  
E. S. Souza
Keyword(s):  
Scalar Field ◽  
Linear Stability ◽  
Explicit Construction ◽  
Field Theories ◽  
Extension Method ◽  
Stability Properties ◽  
Field Systems

AbstractWe present the explicit construction of some multi-scalar field theories in $$(1+1$$ ( 1 + 1 ) dimensions supporting BPS (Bogomol’nyi–Prasad–Sommerfield) kink solutions. The construction is based on the ideas of the so-called extension method. In particular, several new interesting two-scalar and three-scalar field theories are explicitly constructed from non-trivial couplings between well-known one-scalar field theories. The BPS solutions of the original one-field systems will be also BPS solutions of the multi-scalar system by construction, and therefore we will analyse their linear stability properties for the constructed models.

Spherically-symmetric static space-times with minimally coupled scalar field

2010 ◽  
Author(s):  
I. A. Siutosou ◽  
L. M. Tomilchik ◽  
Remo Ruffini ◽  
Gregory Vereshchagin
Keyword(s):  
Scalar Field ◽  
Spherically Symmetric ◽  
Static Space

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.

scholarly journals Spherically symmetric scalar field collapse in any dimension

2002 ◽  
Vol 65 (10) ◽  
Author(s):  
M. Birukou ◽  
V. Husain ◽  
G. Kunstatter ◽  
E. Vaz ◽  
M. Olivier
Keyword(s):  
Scalar Field ◽  
Spherically Symmetric
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