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Vacuum thin shells in Einstein-Gauss-Bonnet brane-world cosmology
(IOP Publishing, 2018-03)
In this paper we construct new solutions of the Einstein-Gauss-Bonnet field equations in an isotropic Shiromizu-Maeda-Sasaki brane-world setting which represent a couple of Z 2-symmetric vacuum thin shells splitting from ...
Fermi velocity reduction in graphene due to enhanced vacuum fluctuations
(IOP Publishing, 2021-09)
It is well known that the confinement of matter inside a microcavity can significantly enhance the light-matter interactions. As a result the vacuum fluctuations, induced by virtual photons, can occur in a volume much lower ...
Difference between the vacuum Casimir energies for grounded and isolated conductors
(American Physical Society, 2016-10)
We study the vacuum (i.e., zero-temperature) Casimir energy for a system of neutral conductors which are isolated, as opposed to grounded. The former is meant to describe a situation where the total charge on each conductor, ...
Virtual prototype of a low-cost vacuum baffle based on thermoelectric cooling
(Pergamon-Elsevier Science Ltd, 2018-05)
Contaminants can enter vacuum systems from two main sources: backstreaming of oil vapors from the diffusion and mechanical pumps, and vapors generated as byproducts in the process chamber. Both sources can be hindered by ...
Modelling of mass transfer and texture evaluation during osmotic dehydration of melon under vacuum
(Wiley Blackwell Publishing, Inc, 2011-02)
The influence of vacuum time and solution concentration on mass transfer and mechanical properties of osmodehydrated melon cubes has been studied. Pulsed vacuum osmotic dehydration (PVOD) was carried out at 30 °C for 4 h, ...
Interacting realization of cosmological singularities with variable vacuum energy
(American Physical Society, 2015-06-18)
We examine an interacting dark matter variable vacuum energy model for a spatially flat Friedmann-Roberston-Walker spacetime, focusing on the appearance of cosmological singularities such as big rip, big brake, big freeze, ...
Mass density of the earth from a gravito-electro-magnetic 5D vacuum
(National Research Council Canada-NRC Research Press, 2017-06)
We calculate the mass density of the Earth using a gravito-electromagnetic theory on an extended 5D Schwarzschild-de Sitter metric, in which we define the vacuum. Our results are in very good agreement with that of the ...
Entanglement harvesting in double-layer graphene by vacuum fluctuations in a microcavity
(American Physical Society, 2018-08-08)
The aim of this work is to study the entanglement harvesting between two graphene layers inside a planar microcavity. Applying time-dependent perturbation theory it is shown that nonclassical correlations between electrons ...
Modified vacuum tubes for overheating limitation of solar collectors: A dynamical modeling approach
(Pergamon-Elsevier Science Ltd, 2018-09)
In this paper are presented two designs of vacuum tubes designed to avoid the overheating of solar collectors. As we discuss, this behavior must be studied by considering the collector's nonlinear dynamic, which is numerically ...
Domain wall interactions due to vacuum Dirac field fluctuations in 2+1 dimensions
(American Physical Society, 2016-07-29)
We evaluate quantum effects due to a two-component Dirac field in 2+1 spacetime dimensions, coupled to domain-wall-like defects with a smooth shape. We show that these effects induce nontrivial contributions to the ...