2003/12/19 by N. G. Parker, N. P. Proukakis, Carlo F. Barenghi +3 · 5 citations
Physics and Astronomy · #Acoustics #Atomic physics #Bose–Einstein condensate #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Dimple #Dipole #Materials science #Mechanics #Physics #Precession #Quantum mechanics #Quantum, superfluid, helium dynamics #Second sound #Sound (geography) #Strong Light-Matter Interactions #Vortex #cond-mat
paper · pdf · doi:10.1103/physrevlett.92.160403
4 pages, 5 figures
arxiv created 2003/12/19 · openalex publication_date 2004/04/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The low temperature dynamics of a vortex in a trapped quasi-two-dimensional Bose-Einstein condensate are studied quantitatively. Precession of an off-centered vortex in a dimple trap, embedded in a weaker harmonic trap, leads to the emission of sound in a dipolar radiation pattern. Sound emission and reabsorption can be controlled by varying the depth of the dimple. In a shallow dimple, the power emitted is proportional to the vortex acceleration-squared over the precession frequency, whereas for a deep dimple, periodic sound reabsorption stabilizes the vortex against radiation-induced decay.