3D Vortices in a silicon nanowire. By superposing two electron states (one moving down the wire in a given transverse confined state; the other moving at higher energy in a different confined state) we obtain a succession of moving vortex tubes. In cross section they are identical to the classical von Karman vortex street. In 3D they resemble tornados or wormholes.
.mov video vortex movie (not good for iPhone or iPad
References
“Normal vortex states and their application in mesoscopic semiconductor devices”
J.R. BARKER
Microelectronic Engineering 63 223-231 (2002)
“On the Completeness of Quantum Hydrodynamics: Vortex Formation and the Need for Both Vector and Scalar Quantum Potentials in Device Simulation”
J.R. BARKER
Journal of Computational Electronics 1 17-21 (2002)
“Quantum hydrodynamics of normal vortices in open semiconductor quantum dots”
J.R. BARKER
Physics of Semiconductors: Proceedings of the 26th International Conference on the Physics of Semiconductors, Edinburgh, 2002, Institute of Physics Conference Series 171, ed A R Long and J H Davies, Institute of Physics Publishing, Bristol (UK) and Philadelphia (USA), P231 (2003)