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期刊论文
Collective Directed Transport of Symmetrically Coupled Lattices in Symmetric Periodic Potentials
PHYSICAL REVIEW LETTERS, 2002, 89 (15): 154102-1~154102-4,-0001,():
A mechanism responsible for the directed transport of symmetrically coupled lattices in a symmetric periodic potential is proposed. Under the action of an external wave that breaks the spatiotemporal symmetry and introduces inhomogeneities of the lattice, a net unidirectional current can be observed, originating from a collaboration of the lattice (periodic potential and mutual interactions) and the wave (amplitude, frequency, and phase shifts). Mode-locking induced resonant steps are observed and predicted. The directed transport can be optimized and furthermore controlled by suitably adjusting the parameters of the system.
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