Abstract
A review is given on (1) the fundamental properties of the quantized vortex filament in superfluid 4He, (2) its dynamics, based mainly on the numerical calculation by Schwarz, and (3) the recent experiments by Avenel and Varoquaux on “phase slippage”, observed in superfluid 4He at ultralow temperatures, which is closely related to the creation and/or motion of the quantized vortex filaments.
