§16§This book springs from the programme Quantized Vortex Dynamics and Sup- ?uid Turbulence held at the Isaac Newton Institute for Mathematical Sciences (University of Cambridge) in August 2000. What motivated the programme was the recognition that two recent developments have moved the study of qu- tized vorticity, traditionally carried out within the low-temperature physics and condensed-matter physics communities, into a new era. The ?rst development is the increasing contact with classical ?uid dynamics and its ideas and methods. For example, some current experiments with - lium II now deal with very classical issues, such as the measurement of velocity spectra and turbulence decay rates. The evidence from these experiments and many others is that super?uid turbulence and classical turbulence share many features. The challenge is now to explain these similarities and explore the time scales and length scales over which they hold true. The observed classical aspects have also attra §16§cted attention to the role played by the ?ow of the normal ?uid, which was somewhat neglected in the past because of the lack of direct ?ow visualization. Increased computing power is also making it possible to study the coupled motion of super?uid vortices and normal ?uids. Another contact with classical physics arises through the interest in the study of super?uid vortex - connections. Reconnections have been studied for some time in the contexts of classical ?uid dynamics and magneto-hydrodynamics (MHD), and it is useful to learn from the experience acquired in other ?elds. §04§ree-Dimensional Superflows.- Bose-Einstein Condensation.- Motion of Objects Through Dilute Bose-Einstein Condensates.- Stability of a Vortex in a Rotating Trapped Bose-Einstein Condensate.- Kinetics of Strongly Non-equilibrium Bose-Einstein Condensation.- Quantum Nucleation of Phase Slips in Bose-Einstein Condensates.- Vortex Reconnections and Classical Aspects.- Vortex Reconnection in Normal and Superfluids.- Helicity in Hydro and MHD Reconnection.- Tropicity and Complexity Measures for Vortex Tangles.- The Geometry of Magnetic and Vortex Reconnection.- Current-Sheet Formation near a Hyperbolic Magnetic Neutral Line.- Nonlocality in Turbulence.- Helium 3 and Other Systems.- Quantized Vorticity in Superfluid 3He-A: Structure and Dynamics.- Vortices in Metastable 4He Films.- Quantum Hall E.ect Breakdown Steps and Possible Analogies with Classical and Super.uid Hydrodynamics.- Atomic Bose Condensate with a Spin Structure: The Use of Bloch State.- Quantum Dynamics of Vortex-Antivorte §04§x Pairs in a Circular Box.
