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Abstract: We explore the dynamics of non-interacting particles loaded into aphase-modulated one-dimensional lattice formed by laterally oscillating squarebarriers. Tuning the parameters of the driven unit cell of the lattice selectedparts of the classical phase space can be manipulated in a controllable manner.We find superdiffusion in position space for all parameters regimes. A directedcurrent of an ensemble of particles can be created through locally breaking thespatiotemporal symmetries of the time-driven potential. Magnitude and directionof the current are tunable. Several mechanisms for transient localization andtrapping of particles in different wells of the driven unit cell are presentedand analyzed.



Autor: Christoph Petri, Florian Lenz, Fotis K. Diakonos, Peter Schmelcher

Fuente: https://arxiv.org/







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