We demonstrate the ability of a highly simplified galactic model to generate mean-field magnetic fields. The generated large-scale magnetic field feeds back to the vertical density stratification which itself is one of the essentials of the basic α-effect. The non-magnetic part of the stratification is due to the gravity potential of the stellar component of the galactic disk. The rotation law ...

We construct and study a class of N particle supersymmetric Hamiltonians with nearest and next-nearest neighbor inverse-square interaction in one dimension. We show that solvable inhomogeneous XY models in an external non-uniform magnetic field can be obtained from these superHamiltonians in a particular limit decoupling the fermionic degrees of freedom from the kinematic ones. We further consi...

Abstract We probe the quantum speed limit (QSL) of an electron when it is trapped in a non-uniform magnetic field. show that QSL increases to large value, but within regime causality, by choosing proper variation fields. also dependence on spin and find higher for spin-down relativistic regime. This can be useful achieving faster transmission information. Further, we use Bremermann–Bekenstein b...

In this study the effect of magnetic Reynolds number variation on magnetic distribution of natural convection heat transfer in an enclosure is numerically investigated. The geometry is a two dimensional enclosure which the left wall is hot, the right wall is cold and the top and bottom walls are adiabatic. Fluid is molten sodium with Pr=0.01 and natural convection heat transfer for Rayleigh num...