scholarly journals Bifurcation and pattern changing with two real scalar fields

2009 ◽  
Vol 79 (8) ◽  
Author(s):  
P. P. Avelino ◽  
D. Bazeia ◽  
R. Menezes ◽  
J. C. R. E. Oliveira
Keyword(s):  
Scalar Fields ◽  
Real Scalar

scholarly journals First-order formalism for twinlike models with several real scalar fields

2014 ◽  
Vol 74 (2) ◽  
Author(s):  
D. Bazeia ◽  
A. S. Lobão ◽  
L. Losano ◽  
R. Menezes
Keyword(s):  
Scalar Fields ◽  
First Order ◽  
Real Scalar

scholarly journals Domain defects in systems of two real scalar fields

1999 ◽  
Vol 1999 (04) ◽  
pp. 028-028 ◽  
Author(s):  
Dionisio Bazeia ◽  
Henrique Boschi-Filho ◽  
Francisco A Brito
Keyword(s):  
Scalar Fields ◽  
Real Scalar

Real scalar field solutions of the EKG equations including matter

2020 ◽  
pp. 2150009
Author(s):  
A. Cabo Montes de Oca ◽  
D. Suarez Fontanella
Keyword(s):  
Dark Matter ◽  
Gravitational Field ◽  
Scalar Field ◽  
Scalar Fields ◽  
Stationary Solutions ◽  
Field Interaction ◽  
Small Bodies ◽  
Real Scalar ◽  
Static Solutions ◽  
Klein Gordon

Static (not stationary) solutions of the Einstein–Klein–Gordon (EKG) equations including matter are obtained for real scalar fields. The scalar field interaction with matter is considered. The introduced coupling allows the existence of static solutions in contraposition with the case of the simpler EKG equations for real scalar fields and gravity. Surprisingly, when the considered matter is a photon-like gas, it turns out that the gravitational field intensity at large radial distances becomes nearly a constant, exerting an approximately fixed force to small bodies at any distance. The effect is clearly related with the massless character of the photon-like field. It is also argued that the gravitational field can generate a bounding attraction, that could avoid the unlimited increase in mass with the radius of the obtained here solution. This phenomenon, if verified, may furnish a possible mechanism for explaining how the increasing gravitational potential associated to dark matter, finally decays at large distances from the galaxies. A method for evaluating these photon bounding effects is just formulated in order to be further investigated.

scholarly journals CLASSICALLY INTEGRABLE FIELD THEORIES WITH DEFECTS

2004 ◽  
Vol 19 (supp02) ◽  
pp. 82-91 ◽  
Author(s):  
P. BOWCOCK ◽  
E. CORRIGAN ◽  
C. ZAMBON
Keyword(s):  
Integrable Field Theories ◽  
Boundary Conditions ◽  
Scalar Fields ◽  
Lagrangian Approach ◽  
Field Theories ◽  
Internal Boundary ◽  
Liouville Type ◽  
Real Scalar ◽  
Integrable Field

Some ideas and remarks are presented concerning a possible Lagrangian approach to the study of internal boundary conditions relating integrable fields at the junction of two domains. The main example given in the article concerns single real scalar fields in each domain and it is found that these may be free, of Liouville type, or of sinh-Gordon type.

TOPOLOGICAL DEFECTS AND THE TRIAL ORBIT METHOD

2002 ◽  
Vol 17 (29) ◽  
pp. 1945-1953 ◽  
Author(s):  
D. BAZEIA ◽  
W. FREIRE ◽  
L. LOSANO ◽  
R. F. RIBEIRO
Keyword(s):  
Differential Equations ◽  
Equations Of Motion ◽  
Topological Defects ◽  
Scalar Fields ◽  
Explicit Solutions ◽  
Orbit Method ◽  
First Order ◽  
Real Scalar ◽  
Second Order Equations ◽  
First Order Differential Equations

We deal with the presence of topological defects in models for two real scalar fields. We comment on defects hosting topological defects and search for explicit defect solutions using the trial orbit method. As we know, under certain circumstances the second-order equations of motion can be solved by solutions of first-order differential equations. In this case we show that the trial orbit method can be used very efficiently to obtain explicit solutions.

scholarly journals KINKS AND DOMAIN WALLS IN MODELS FOR REAL SCALAR FIELDS

2004 ◽  
Vol 19 (04) ◽  
pp. 575-592 ◽  
Author(s):  
D. BAZEIA ◽  
A. S. INÁCIO ◽  
L. LOSANO
Keyword(s):  
High Energy Physics ◽  
Domain Walls ◽  
Topological Defects ◽  
Scalar Fields ◽  
High Energy ◽  
Specific Model ◽  
Real Scalar ◽  
Thermal Investigations ◽  
Spatially Extended ◽  
The One

We investigate several models described by real scalar fields, searching for topological defects, and investigating their linear stability. We also find bosonic zero modes and examine the thermal corrections at the one-loop level. The classical investigations are of direct interest to high energy physics and to applications in condensed matter, in particular to spatially extended systems where fronts and interfaces separating different phase states may appear. The thermal investigations show that the finite temperature corrections that appear in a specific model induce a second-order phase transition in the system, although the thermal effects do not suffice to fully restore the symmetry at high temperature.

scholarly journals Lorentz-violating effects on topological defects generated by two real scalar fields

2010 ◽  
Vol 239 (12) ◽  
pp. 942-947 ◽  
Author(s):  
D. Bazeia ◽  
M.M. Ferreira ◽  
A.R. Gomes ◽  
R. Menezes
Keyword(s):  
Topological Defects ◽  
Scalar Fields ◽  
Real Scalar

scholarly journals New Models for Two Real Scalar Fields and Their Kink-Like Solutions

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
A. Alonso-Izquierdo ◽  
D. Bazeia ◽  
L. Losano ◽  
J. Mateos Guilarte
Keyword(s):  
High Energy Physics ◽  
Scalar Fields ◽  
High Energy ◽  
Current Work ◽  
Current Interest ◽  
Real Scalar ◽  
New Models ◽  
Energy Physics

We study the presence of kinks in models described by two real scalar fields in bidimensional spacetime. We generate new two-field models, constructed from distinct but important one-field models, and we solve them with techniques that we introduce in the current work. We illustrate the results with several examples of current interest to high energy physics.

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