Gligorić GBodyfelt JDFlach S1/11/20111/11/2011EPL, 2011, 96 (3), pp. ? - ? (6)0295-5075https://hdl.handle.net/10179/7476Bose-Einstein condensates loaded into kicked optical lattices can be treated as quantum kicked-rotor systems. Noninteracting rotors show dynamical localization in momentum space. The experimentally tunable condensate interaction is included in a qualitative Gross-Pitaevskii-type model based on two-body interactions. We observe strong- and weak-chaos regimes of wave packet spreading in momentum space. In the intermediate strong-chaos regime the condensate energy grows as t1/2. In the asymptotic weak-chaos case the growth crosses over into a t1/3 law. The results do not depend on the details of the kicking. © Europhysics Letters Association.? - ? (6)Science & TechnologyPhysical SciencesPhysics, MultidisciplinaryPhysicsPHYSICS, MULTIDISCIPLINARYQUANTUM CHAOSSYSTEMSATOMSJournal article10.1209/0295-5075/96/30004163968Massey_Dark01 Mathematical Sciences02 Physical Sciences