2,789 research outputs found
Generalized Gaussian Effective Potential: Low Dimensional Scalar Fields
We study a generalization of the Gaussian effective potential for
self-interacting scalar fields in one and two spatial dimensions. We compute
the two-loop corrections and discuss the renormalization of the generalized
Gaussian effective potential.Comment: tex, 10 pages + 4 Postscript figures include
Electrodynamics in an LTB scenario
In this article we analyze the electrodynamics in curved space-time in LTB
metric. We calculate the most general scale factor in this inhomogeneous
Universe. We also study the presence of electromagnetic field bubbles in the
Universe.Comment: 9 pages, Accepted for publication in the EPJ
Cosmic acceleration and theory: perturbed solution in a matter FLRW model
In the present paper we consider gravity theories in the metric
approach and we derive the equations of motion, focusing also on the boundary
conditions. In such a way we apply the general equations to a first order
perturbation expansion of the Lagrangian. We present a model able to fit
supernovae data without introducing dark energy.Comment: 10 pages, 1 figur
The Impact Of Environmental Issues And Stakeholder Expectations On U.S. Institutional And Programmatic Accreditation
The Impact Of Environmental Issues And Stakeholder Expectations On U.S. Institutional And Programmatic Accreditation
On the Primordial Magnetic Field from Domain Walls
In this paper we discuss once more the zero mode contribution to the vacuum energy density. We show that a careful treatment of the zero modes leads to the conclusion that domain walls may be ferromagnetic, and could generate a magnetic field of cosmological interest
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