We propose a new approach to quantification of intracardiac vorticity based on conventional color Doppler images -Doppler vortography. Doppler vortography relies on the centrosymmetric properties of the vortices. Such properties induce particular symmetries in the Doppler flow data that can be exploited to describe the vortices quantitatively. For this purpose, a kernel filter was developed to ...

Vortices and axisymmetric vortex rings are considered in the framework of the subcritical nonlinear Schrödinger equations. The higher order nonlinearity present in such systems models many-body interactions in superfluid systems and allows one to study the effects of negative pressure on vortex dynamics. We find the critical pressure for which the straight-line vortex becomes unstable to radial...

The effective manipulation of the orientation of a vortex core by spin-polarized currents introduces the technologically relevant possibility of addressing individual nanomagnets within large arrays. The vortex configuration, which minimizes the interactions between elements, in principle, allows for high integration densities. Using micromagnetic simulations, we find however that the polarity ...

In an accompanying paper [J.A. Sauls and M. Eschrig, Vortices in chiral, spin-triplet superconductors and superfluids, this issue] we have studied the equilibrium properties of vortices in a chiral quasi-twodimensional triplet superfluid/superconductor. Here we extend our studies to include the dynamical response of a vortex core in a chiral triplet superconductor to an external a.c. electromag...

Rotating vortices are easily pinned to any defects in excitable media. Moderate advective fields cannot remove the pinned vortices. We have found and tested experimentally a mechanism for unpinning a vortex. To unpin a vortex, we created additional waves close to its core. A vortex can be unpinned when a new created wave is pinned to the same obstacle and has a topological defect. This mechanis...

A microscopic, quantum mechanical model for neutron vortices in the crust of a neutron star is presented. After a brief introduction to the Bogoliubov-de Gennes equations, which form the basis for our calculations, we present results for density distributions, vortex core sizes and vortex energies, both for an isolated neutron vortex and for the case when the vortex core overlaps with a cylindr...

In the topological superconductor with nematic superconductivity in $E_u$ representation, it is possible to have different types of vortices. One associated vorticity particle-hole space and corresponds Abrikosov vortex. Another type spin called We study interaction vortex derive free energy sample strain-induced vortices using Ginzburg-Landau approach for two-component superconducting order pa...

We show how a singly quantized vortex can exhibit energetically stable defect cores with different symmetries in an atomic spin-1 polar Bose-Einstein condensate, and how a stable topologically nontrivial Skyrmion texture of lower dimensionality can be confined inside the core. The core isotropy and the stability of the confined texture are sensitive to Zeeman level shifts. The observed structur...

We study the motion of a superfluid vortex in condensates having different background density profiles, ranging from parabolic to uniform. The resulting effective point-vortex model for generic power-law potential $\ensuremath{\propto}{r}^{k}$ can be experimentally realized with recent advances optical-trapping techniques. Our analysis encompasses both empty-core and filled-core vortices. In la...

We revisit the classical problem of self-similar, finite-time collapse three vortices. extend study to generalised two-dimensional Euler equations as well three-dimensional quasi-geostrophic equations. In both these situations, flow is fully controlled by a materially-conserved field vorticity (or potential vorticity) related streamfunction modified Poisson’s equation, in which standard Laplaci...