2006/09/21 by Dario Poletti, Giuliano Benenti, Giulio Casati +1 · 2 citations
Computer Science · Physics and Astronomy · #Nonlinear Dynamics and Pattern Formation #Spectroscopy and Quantum Chemical Studies #cond-mat.other #quant-ph #stochastic dynamics and bifurcation
paper · pdf · doi:10.1103/physreva.76.023421
published as Phys. Rev. A 76, 023421 (2007) · 4 pages, 4 figures
arxiv created 2006/09/21 · openalex publication_date 2007/08/24 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study the dynamics of a dilute Bose-Einstein condensate confined in a toroidal trap and exposed to a pair of periodically flashed optical lattices. We first prove that in the noninteracting case this system can present a quantum symmetry which forbids the ratchet effect classically expected. We then show how many-body atom-atom interactions, treated within the mean-field approximation, can break this quantum symmetry, thus generating directed transport.