2003/07/31 by Daw-Wei Wang, Mikhail D. Lukin, Eugene Demler
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum, superfluid, helium dynamics #Strong Light-Matter Interactions #cond-mat.soft #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.92.076802
published as Phys. Rev. Lett. 92, 076802 (2004) · Revised version. This paper has been selected for the March 1, 2004 issue of Virtual Journal of Nanoscale Science & Technology (http://www.vjnano.org)
openalex publication_date 2004/02/18 · arxiv created 2004/03/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We analyze the effects of a random magnetic potential in a microfabricated waveguide for ultracold atoms. We find that the shape and position fluctuations of a current carrying wire induce a strong Gaussian correlated random potential with a length scale set by the atom-wire separation. The theory is used to explain quantitatively the observed fragmentation of the Bose-Einstein condensates in atomic waveguides. Furthermore, we show that nonlinear dynamics can be used to provide important insights into the nature of the strongly fragmented condensates. We argue that a quantum phase transition from the superfluid to the insulating Bose glass phase may be reached and detected under the realistic experimental conditions.