2000/12/31 by Hans Peter Büchler, H. P. Büchler, V. B. Geshkenbeǐn +2 · 2 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum, superfluid, helium dynamics #Strong Light-Matter Interactions #cond-mat.soft #cond-mat.stat-mech
paper · pdf · doi:10.1103/physrevlett.87.100403
published as Phys. Rev. Lett. 87, 100403 (2001) · 4 pages, 1 figure
arxiv created 2001/05/02 · openalex publication_date 2001/08/20 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the superfluid properties of (quasi) one-dimensional bosonic atom gases/liquids in traps with finite geometries in the presence of strong quantum fluctuations. Driving the condensate with a moving defect we find the nucleation rate for phase slips using instanton techniques. While phase slips are quenched in a ring resulting in a superfluid response, they proliferate in a tube geometry where we find Bloch oscillations in the chemical potential. These Bloch oscillations describe the individual tunneling of atoms through the defect and thus are a consequence of particle quantization.