scholarly journals Self-force of a scalar charge in the space-time of extreme charged anti-dilatonic wormhole

2018 ◽  
Vol 15 (03) ◽  
pp. 1850050 ◽  
Author(s):  
A. A. Popov ◽  
O. Aslan
Keyword(s):  
Scalar Field ◽  
Space Time ◽  
The Self ◽  
Massless Scalar ◽  
Massless Scalar Field ◽  
Minimal Coupling ◽  
Scalar Charge ◽  
Self Force

The self-interaction for a static scalar charge in the space-time of extreme charged anti-dilatonic wormhole is calculated. We assume that the scalar charge is the source of massless scalar field with minimal coupling of the scalar field to the curvature of spacetime.

scholarly journals Scalar self-force on static charge in a long throat

2015 ◽  
Vol 30 (22) ◽  
pp. 1550143 ◽  
Author(s):  
A. Popov ◽  
O. Aslan
Keyword(s):  
Scalar Field ◽  
Large Mass ◽  
Space Time ◽  
The Self ◽  
Nonminimal Coupling ◽  
Static Charge ◽  
Scalar Charge ◽  
Self Force

We compute the self-force on a scalar charge at rest in the space–time of long throat. We consider arbitrary values of the mass of the scalar field and the constant of nonminimal coupling of the scalar field to the curvature of space–time. We also show the coincidence of explicit calculations of self-force in the limit of large mass of the field with known results.

scholarly journals The Lorentz-violating real scalar field at thermal equilibrium

2021 ◽  
Vol 81 (5) ◽  
Author(s):  
A. R. Aguirre ◽  
G. Flores-Hidalgo ◽  
R. G. Rana ◽  
E. S. Souza
Keyword(s):  
Scalar Field ◽  
Thermal Equilibrium ◽  
Tensor Field ◽  
Lorentz Violation ◽  
The Self ◽  
Massless Scalar ◽  
Massless Scalar Field ◽  
Exact Results ◽  
Coupling Constant ◽  
Real Scalar

AbstractIn this paper we study Lorentz-violation (LV) effects on the thermodynamics properties of a real scalar field theory due to the presence of a constant background tensor field. In particular, we analyse and compute explicitly the deviations of the internal energy, pressure, and entropy of the system at thermal equilibrium due to the LV contributions. For the free massless scalar field we obtain exact results, whereas for the massive case we perform approximated calculations. Finally, we consider the self interacting $$\phi ^4$$ ϕ 4 theory, and perform perturbative expansions in the coupling constant for obtaining relevant thermodynamics quantities.

scholarly journals NAKED SINGULARITIES IN THREE-DIMENSIONS

2003 ◽  
Vol 12 (05) ◽  
pp. 791-799
Author(s):  
G. OLIVEIRA-NETO
Keyword(s):  
Scalar Field ◽  
Analytical Solution ◽  
Cosmic Censorship ◽  
The Self ◽  
Three Dimensions ◽  
Massless Scalar ◽  
Massless Scalar Field ◽  
Naked Singularities ◽  
Asymptotically Flat ◽  
Self Similar

We study an analytical solution to the Einstein's equations in (2+1)-dimensions, representing the self-similar collapse of a circularly symmetric, minimally coupled, massless, scalar field. Depending on the value of certain parameters, this solution represents the formation of naked singularities. Since our solution is asymptotically flat, these naked singularities may be relevant for the weak cosmic censorship conjecture in (2+1)-dimensions.

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