Topological defects and smooth excitations determine the properties of systems showing
collective order. We introduce a generic non-singular field theory that comprehensively …

Cellular rearrangements, as primary sources of tissue fluidization, facilitate topological
transitions during tissue morphogenesis. We study the role of intrinsic cell properties such as …

We theoretically investigate the critical velocity for dissipationless motion of a two-
dimensional superfluid past a static potential barrier of large width. The circular-shaped …

The core functionality of ComFiT is provided in the BaseSystem class, which defines a
computational domain, auxiliary quantities, methods for time evolution, visualization tools …

In two spatial dimensions, vortex-vortex interactions approximately vary with the logarithm of
the inter-vortex distance, making it possible to describe an ensemble of vortices as a …

In this thesis, we have numerically studied the formation of quantum vortex loops in a zero-
temperature Bose-Einstein condensate and oscillations of the Kelvin waves that dissipate …