Description of Research Area

Self-Organization Affected by the Flow of Fluid in Quantum Condensate and Soft Matter systems

Research Subject

Magnetic domain patterns, which correspond to self-organization of spins, are observed in a ferromagnetic Bose-Einstein condensate (BEC) as well as in a ferromagnet. We focus on the domain growth law in a (quasi-)two-dimensional ferro magnetic BEC when the magnetization arises in the x-y plane. The pattern formation and domain growth in the system are complicated because of the interaction between spin vortices and superfluid flow. We try to find whether a universal law of domain growth exists in the system and under what condition the growth law is valid.
Self-organization often emerges also in soft matter systems. For example, when a paint, which is polymer solution, dries, an inhomogeneous pattern often appears depending on the viscosity and evaporation of the paint and the condition of a substrate. We try to find out the condition for homogeneous painting, the mechanism of the emergence of an inhomogeneous pattern and the effects of the flow in the solution.

Research Partner

KAWAGUCHI, Yuki

Department of Applied Physics, Nagoya University