<< Vortex filaments in classical and quantum fluids and DNA macromolecules, magnetic flux tubes, phase defects, polymers may interact and recombine through reconnection of neighboring strands. Details of the process depend on specific local mechanisms that may differ from case to case, but certain qualitative features — such as the preservation of the original strand orientation after recombination — are generic and common to all systems. >>
<< The study of these processes is clearly of great importance, because the change of topology is often accompanied by a change in energy, entropy and function. >>
<< (..) HOMFLYPT polynomial recently introduced for fluid knots (..) provides a powerful tool to measure topological complexity of various physical systems. >>
Liu, X., Ricca, R. L. Knots cascade detected by a monotonically decreasing sequence of values. Sci. Rep.6, 24118; doi: 10.1038/srep24118 (2016).
Quanta energia è nascosta nel caos? Bicocca, Milano, 2 maggio 2016