17,104 research outputs found
Charged anisotropic compact objects by gravitational decoupling
In the present article, we have constructed a static charged anisotropic
compact star model of Einstein field equations for a spherically symmetric
space-time geometry. Specifically, we have extended the charged isotropic
Heintzmann solution to an anisotropic domain. To address this work, we have
employed the gravitational decoupling through the so called minimal geometric
deformation approach. The charged anisotropic model is representing the
realistic compact objects such as and . We
have reported our results in details for the compact star on the
ground of physical properties such as pressure, density, velocity of sound,
energy conditions, stability conditions, Tolman-Oppenheimer-Volkoff equation
and redshift etc
BAREMO: How to Choose the Appropriate Software Component Using the Analytic Hierarchy Process
To select a software component from several similar candidates is a complex task, since each project pursues different objectives. We intend to use the Analytic Hierarchy Process in the taking of multicriteria decisions for software component reuse. This method is called BAREMO. It will help the software engineer to make estimations which will enable him/her to choose the appropriate component. The article presents a case study of the application of the method, where a project manager assesses a certain software component in order to consider its reuse in the domain of image processing
Topological thermalization via vortex formation in ultra-fast quenches
We investigate the thermalization of a two-component scalar field across a
second-order phase transition under extremely fast quenches. We find that
vortices start developing at the final temperature of the quench, i.e., below
the critical point. Specifically, we find that vortices emerge once the
fluctuating field departures from its symmetric state and evolves towards a
metastable and inhomogenous configuration. The density of primordial vortices
at the relaxation time is a decreasing function of the final temperature of the
quench. Subsequently, vortices and antivortices annihilate at a rate that
eventually determines the total thermalization time. This rate decreases if the
theory contains a discrete anisotropy, which otherwise leaves the primordial
vortex density unaffected. Our results thus establish a link between the
topological processes involved in the vortex dynamics and the delay in the
thermalization of the system.Comment: 7 pages, 8 figures, 1 movie to be uploaded as Supplemental Material
in the published versio
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