The Casimir energy of quantum uctuations about the classical kink connguration is computed numerically in the weak coupling approximation for a recently proposed lattice sine-Gordon model. This energy depends periodically on the kink position and is found to be approximately sinusoidal.

The Kaluza-Klein reduction of 4d conformally flat spacetimes is reconsidered. The corresponding 3d equations are shown to be equivalent to 2d gravitational kink equations augmented by a centrifugal term. For space-like gauge fields and nontrivial values of the centrifugal term the gravitational kink solutions describe a spacetime that is divided in two disconnected regions.

Stability properties of “magnetic tower” jets propagating in the gravitationally stratified background have been examined by performing three-dimensional magnetohydrodynamic simulations. The current-carrying, Poynting flux-dominated magnetic tower jet, which possesses a highly wound helical magnetic field, is subject to the current-driven instability (CDI). We find that, under general physical ...

Kink-band strengthening was first quantitatively evaluated using an Mg–Zn–Y single crystal containing long-period stacking ordered (LPSO) nanoplates. The ability of a kink-band boundary to act as a...

We consider the existence and spectral stability of static multi-kink structures in discrete sine-Gordon equation, as a representative example family Klein-Gordon models. The multi-kinks are constructed using Lin's method from an alternating sequence well-separated kink antikink solutions. then locate point spectrum associated with these solutions by reducing problem to matrix equation. For $m$...