Directed transport and localization in phase-modulated driven lattices

We explore the dynamics of non-interacting particles loaded into a phase-modulated one-dimensional lattice formed by laterally oscillating square barriers. Tuning the parameters of the driven unit cell of the lattice selected parts of the classical phase space can be manipulated in a controllable ma...

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Bibliographic Details
Published in:arXiv.org 2010-04
Main Authors: Petri, Christoph, Lenz, Florian, Diakonos, Fotis K, Schmelcher, Peter
Format: Article
Language:English
Subjects:
Lattices
Loads (forces)
Localization
Parameters
Unit cell
Online Access:Get full text
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Summary:We explore the dynamics of non-interacting particles loaded into a phase-modulated one-dimensional lattice formed by laterally oscillating square barriers. Tuning the parameters of the driven unit cell of the lattice selected parts of the classical phase space can be manipulated in a controllable manner. We find superdiffusion in position space for all parameters regimes. A directed current of an ensemble of particles can be created through locally breaking the spatiotemporal symmetries of the time-driven potential. Magnitude and direction of the current are tunable. Several mechanisms for transient localization and trapping of particles in different wells of the driven unit cell are presented and analyzed.
ISSN:2331-8422
DOI:10.48550/arxiv.1004.3894