2008/05/14 by G. S. Ng, Gim Seng Ng, H. Hennig +6 · 2 citations
Physics and Astronomy · #Bose–Einstein condensate #Breather #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Lattice (music) #Nonlinear Photonic Systems #Nonlinear system #Optical lattice #Parameter space #Physics #Population #Quantum mechanics #Strong Light-Matter Interactions #cond-mat.other #cond-mat.stat-mech #nlin.CD
paper · pdf · doi:10.1088/1367-2630/11/7/073045
7 pages and 3 figures
arxiv created 2008/05/14 · openalex publication_date 2009/07/23 · arxiv updated 2015/05/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the decay of an atomic Bose–Einstein condensate (BEC) population N (τ) from the leaking boundaries of an optical lattice (OL). For a rescaled interatomic interaction strength Λ>Λ b , discrete breathers (DBs) are created that prevent the atoms from reaching the leaking boundaries. Collisions of other lattice excitations with the outermost DBs result in avalanches, i.e. steps in N (τ), which for a whole range of Λ-values follow a scale-free distribution P ( J =δ N )∼1/ J α . A theoretical analysis of the mixed phase space of the system indicates that 1<α<3, in agreement with our numerical findings.