Abstract We present results from an experimental investigation of two closely spaced helical vortices. The co-rotating vortices are generated in a water channel by one-bladed rotor, whose tip geometry is modified the addition perpendicular fin on pressure side. parameters tuned so that have approximately equal circulation. Dye visualisations and flow field measurements Particle Image Velocimetr...

Vortex is a topological defect with a quantized winding number of the phase in superfluids and superconductors. Here, we investigate the crystallized (triangular, square, honeycomb) and amorphous vortices in rotating atomic-molecular Bose-Einstein condensates (BECs) by using the damped projected Gross-Pitaevskii equation. The amorphous vortices are the result of the considerable deviation induc...

Vortices are long-lived features of geophysical and laboratory flows. They emerge in free-decay turbulence and govern the long-term evolution of the flow. In 2D flows, two vortices can grow by merger when they are like-signed. The process of vortex merger in 2D flows is well known for a pair of isolated vortices. Nevertheless, in a turbulent field, the velocity field created by neighboring vort...

We calculate stable arrangements for a single superfluid vortex pinned to the wall of a cylindrical container. We find that, independent of the details of the pinning site, stable vortices must subtend most of the cell horizontally and cannot be vertical or nearly vertical. More generally, the geometry of a container severely limits the possible vortex configurations, making macroscopic trapped...

We study the possible connection between centre vortices and P-vortices in SU(2) gauge theory. After briefly recalling some essential properties of centre vortices we point out that there is no known a priori connection between the gauge dependent P-vortices and the gauge invariant centre vortices. We then show by Monte Carlo simulations that the ‘centre projected physics’ strongly depends on t...

Using Lorentz microscopy to directly image vortices, we investigate vortex motion control and rectification in a niobium superconductor. We directly observe a net motion of vortices along microfabricated channels with a spatially asymmetric potential, even though the vortices were driven by an oscillatory field. By observing the individual motion of vortices, we clarify elementary processes inv...

We calculate stable arrangements for a single superfluid vortex pinned to the wall of a stationary cylindrical container. We find that, independent of the details of the pinning site, stable vortices must subtend most of the cell horizontally and cannot be vertical or nearly vertical. More generally, the geometry of a container severely limits the possible vortex configurations, making macrosco...

Abstract We consider the dynamical properties of quantum vortices with filled massive cores, hence term “massive vortices”. While motion massless is described by first-order equations, inclusion core mass introduces a second-order time derivative in equations and thus doubles number independent variables needed to describe vortex. The simplest possible system where this physics present, i.e. si...

We show that strong electronic repulsion transforms a vortex core from metallic-type in overdoped regime to Mott-insulator at underdoping of strongly correlated d-wave superconductor. This changeover is accompanied by an accumulation electron density the towards local half-filling underdoped region, which turn facilitates formation Mott insulating core. find size vortices evolves non-monotonica...