13 research outputs found
Stable vortex structures in colliding self-gravitating Bose-Einstein condensates
A key feature of ultra-light dark matter composed by bosons is the formation
of superfluid Bose-Einstein condensate (BEC) structures on galactic scales. We
study collisions of BEC solitonic and vortex structures in the framework of the
Gross-Pitaevskii-Poisson model. It is found that the superfluid nature of
bosonic dark matter leads to the formation of quantized vortex lines and vortex
rings in interference patterns formed during collisions. Calculating the
gravitational wave luminosity, we demonstrated that quantum interference
patterns affect notably the gravitational wave radiation.
We reveal that superfluid self-gravitating BECs can form stable localized
vortex structures which remain robust even after a head-on collision.Comment: 9 pages, 8 figure
Nonlinearity and Topology
The interplay of nonlinearity and topology results in many novel and emergent
properties across a number of physical systems such as chiral magnets, nematic
liquid crystals, Bose-Einstein condensates, photonics, high energy physics,
etc. It also results in a wide variety of topological defects such as solitons,
vortices, skyrmions, merons, hopfions, monopoles to name just a few.
Interaction among and collision of these nontrivial defects itself is a topic
of great interest. Curvature and underlying geometry also affect the shape,
interaction and behavior of these defects. Such properties can be studied using
techniques such as, e.g. the Bogomolnyi decomposition. Some applications of
this interplay, e.g. in nonreciprocal photonics as well as topological
materials such as Dirac and Weyl semimetals, are also elucidated