Unidirectional transport of wave packets through tilted discrete breathers in nonlinear lattices with asymmetric defects.

  title={Unidirectional transport of wave packets through tilted discrete breathers in nonlinear lattices with asymmetric defects.},
  author={Xiao-Dong Bai and Boris A. Malomed and Fuguo Deng},
  journal={Physical review. E},
  volume={94 3-1},
We consider the transfer of lattice wave packets through a tilted discrete breather (TDB) in opposite directions in the discrete nonlinear Schrödinger model with asymmetric defects, which may be realized as a Bose-Einstein condensate trapped in a deep optical lattice, or as optical beams in a waveguide array. A unidirectional transport mode is found, in which the incident wave packets, whose energy belongs to a certain interval between full reflection and full passage regions, pass the TDB only… 
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