2004/10/11 by Christophe Josserand, Yves Pomeau
Mathematics · Physics and Astronomy · #Bifurcation #Classical mechanics #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Mathematics #Mechanics #Nonlinear system #Physics #Quantization (signal processing) #Quantum mechanics #Quantum, superfluid, helium dynamics #Saddle #Strong Light-Matter Interactions #Vortex #cond-mat.other
paper · pdf · doi:10.1103/physreva.72.023618
4 pages, 3 figures
arxiv created 2004/10/11 · openalex publication_date 2005/08/29 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In a condensate made of two different atomic molecular species, Onsager's quantization condition implies that around a vortex, the velocity field cannot be the same for the two species. We explore some simple consequences of this observation. Thus, if the two condensates are in slow relative translation one over the other, the composite vortices are carried at a velocity that is a fraction of the single-species velocity. This property is valid for attractive interaction and below a critical velocity which corresponds to a saddle-node bifurcation.