Analysis of interface conversion processes of ballistic and diffusive motion in driven superlattices

Abstract

We explore the non-equilibrium dynamics of non-interacting classical particles in a one-dimensional driven superlattice which is composed of domains exposed to different time-dependent forces. It is shown how the combination of directed transport and conversion processes from diffusive to ballistic motion causes strong correlations between velocity and phase for particles passing through a superlattice. A detailed understanding of the underlying mechanism allows us to tune the resulting velocity distributions at distinguished points in the superlattice by means of local variations of the applied driving force. As an intriguing application we present a scheme how initially diffusive particles can be transformed into a monoenergetic pulsed particle beam whose parameters such as its energy can be varied.

References in corpus (5)

• Quasiperiodically driven ratchets for cold atoms
• Generic Quantum Ratchet Accelerator with Full Classical Chaos
• Vibrational mechanics in an optical lattice: controlling transport via potential renormalization
• ac-driven atomic quantum motor
• The ratchet effect and the transporting islands in the chaotic sea

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• Symmetries and transport in site-dependently driven quantum lattices
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• Multiple current reversals using superimposed driven lattices
• Controlling transport of underdamped particles in two-dimensional driven Bravais lattices
• Diffusion and transport in locally disordered driven lattices