نتایج جستجو برای: scalar potentials

تعداد نتایج: 149114  

Journal: :Journal of Physics A: Mathematical and Theoretical 2014

2006
Alexey V. TOPORENSKY

A transient chaos in a closed FRW cosmological model with a scalar field is studied. We describe two different chaotic regimes and show that the type of chaos in this model depends on the scalar field potential. We have found also that for sufficiently steep potentials or for potentials with large cosmological constant the chaotic behavior disappears.

Journal: :International Journal of Modern Physics D 2007

Journal: :Physical review research 2023

The nonequilibrium dynamics of light in a coherently driven nonlinear cavity resembles the equilibrium Brownian particle scalar potential. This resemblance has been known for decades, but correspondence between two systems never properly assessed. Here we demonstrate that this can be exact, approximate, or break down, depending on driving conditions. For vanishing nonlinearity and on-resonance ...

2007
José A. Heras

Abstract This paper presents a simple and systematic method to show how the potentials in the Lorentz, Coulomb, Kirchhoff, velocity and temporal gauges yield the same retarded electric and magnetic fields. The method appropriately uses the dynamical equations for the scalar and vector potentials to obtain two wave equations, whose retarded solutions lead to the electric and magnetic fields. The...

2007
A. Arbey

We study the loop corrections to potentials of complex or coupled real scalar fields used in cosmology to account for dark energy, dark matter or dark fluid. We show that the SUGRA quintessence and dark matter scalar field potentials are stable against the quantum fluctuations, and we propose solutions to the instability of the potentials of coupled quintessence and dark fluid scalar fields. We...

1998
Andrew R. Liddle Robert J. Scherrer

An attractive method of obtaining an effective cosmological constant at the present epoch is through the potential energy of a scalar field. Considering models with a perfect fluid and a scalar field, we classify all potentials for which the scalar field energy density scales as a power law of the scale factor when the perfect fluid density dominates. There are three possibilities. The first tw...

2008
Mark D. Roberts

A generalization of scalar electrodynamics called fluid electrodynamics is presented. In this theory a fluid replaces the Higgs scalar field. Fluid electrodynamics might have application to the theory of low temperature Helium superfluids, but here it is argued that it provides an alternative method of approaching symmetry breaking in particle physics. The method of constructing fluid electrody...

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