Nicolas Pavloff: Topological Pathways to Two-Dimensional Quantum Turbulence
Автор: WSUPhysics
Загружено: 2025-03-26
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WSU Physics Colloquium: 20 March 2025
Nicolas Pavloff: Topological Pathways to Two-Dimensional Quantum Turbulence
I shall present combined experimental and theoretical investigations of the
formation and decay kinetics of quantum vortices in a two-dimensional turbulent superfluid. I will discuss the relevance of the concept of point vortex in describing superfluid dynamics, tracing its origins back to 19th-century studies of tides by British physicists. Fundamental topological conservation laws require that the formation and annihilation of vortices also involve critical points of the velocity field, namely nodes and saddles. Identifying the simplest bifurcations underlying these processes enables to develop an effective kinetic model that closely aligns with experimental observations, revealing that distinct mechanisms underlie the growth and decay of the vortex population.
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