2002/04/03 by E. Sakellari, M. L. Leadbeater, M. Leadbeater +3 · 21 citations
Physics and Astronomy · #Bose–Einstein condensate #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Josephson effect #Physics #Quantum mechanics #Quantum, superfluid, helium dynamics #Spectroscopy #Strong Light-Matter Interactions #Superconductivity #cond-mat
paper · pdf · doi:10.1103/physreva.66.033612
published in Physical Review A 66(3) (American Physical Society)
arxiv created 2002/04/03 · openalex publication_date 2002/09/23 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The dc and ac Josephson dynamics of a Bose-Einstein condensate in a double-well potential is analyzed in terms of transitions between energy eigenstates. By solving the time-independent and time-dependent Gross-Pitaevskii equations in one dimension, we identify population transfer associated with level crossings, and determine the critical velocity that characterizes the transition. We test the validity of a nonlinear two-state model, and show that for the experimentally interesting case, where the critical velocity is large, the influence of higher-lying states is important.