2000/02/24 by Peter D. Drummond, Drummond, Peter D., Antonios Eleftheriou +5
Physics and Astronomy · #Condensed Matter (cond-mat) #FOS: Physical sciences #cond-mat
paper · pdf · doi:10.48550/arxiv.cond-mat/0002389
8 pages, 4 figures, using BoxedEPS macros; email correspondence to [email protected]
arxiv created 2000/02/24 · arxiv updated 2009/11/30
We consider a possible technique for mode-locking an atom laser, based on the generation of a dark soliton in a ring-shaped Bose-Einstein condensate, with repulsive atomic interactions. The soliton is a kink, with angular momentum per particle equal to ℏ/2. It emerges naturally, when the condensate is stirred at the soliton velocity, and subsequently outcoupled with a periodic Raman pulse-train. The result is a replicating coherent field inside the atom laser. We give a numerical demonstration of the generation and stabilization of the soliton.