Abstract
We investigate the quantum transport dynamics governed by the nonlinear Schrödinger equation with a periodically--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.
- Received 25 June 2013
- Revised 26 January 2014
DOI:https://doi.org/10.1103/PhysRevE.90.022907
©2014 American Physical Society