Boris Svistunov

The decades-long history of theoretical understanding of the phenomenon of superfludity—from the Tisza-Landau phenomenology to the modern picture based on the emergence of topological constant of motion—has been most dramatic and instructive. Critically overviewing main historic steps highlights the crucial importance of the topological language for revealing the origin the phenomenon, as well as for establishing general relations of superfluid hydrodynamics, Berezinskii-Kosterlitz-Thouless transition, and superfluid-insulator quantum phase transitions in one dimension.