title: Nonlinearity effects on the directed momentum current.
abstract: We investigate the quantum transport dynamics governed by the nonlinear Schrödinger equation with a periodically-δ-kicking potential and discover the emergence of a directed current in momentum space. With the increase of nonlinearity, we find strikingly that the momentum current decreases, reverses, and finally vanishes, indicating that the quantum transport can be effectively manipulated through adjusting the nonlinearity. The underlying dynamic mechanism is uncovered and some important implications are addressed.
authors.affiliation: School of Science, Jiangxi University of Science and Technology, Ganzhou 341000, China and National Laboratory of Science and Technology on Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China and HEDPS, Center for Applied Physics and Technology, Peking University, Beijing 100084, China.
authors.forename: Wen-Lei
authors.initials: WL
authors.lastname: Zhao
authors.affiliation: National Laboratory of Science and Technology on Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China and HEDPS, Center for Applied Physics and Technology, Peking University, Beijing 100084, China.
authors.forename: Li-Bin
authors.initials: LB
authors.lastname: Fu
authors.affiliation: National Laboratory of Science and Technology on Computational Physics, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China and HEDPS, Center for Applied Physics and Technology, Peking University, Beijing 100084, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Liu
mesh_terms: D008962:Models, Theoretical; D017711:Nonlinear Dynamics; D011336:Probability; D011789:Quantum Theory