Nonadiabatic pumping in classical and quantum chaotic scatterers

Details Nonadiabatic pumping in classical and quantum chaotic scatterers Nonadiabatic pumping in classical and quantum chaotic scatterers

2011-11-07

arxiv.org/abs/1111.1653v3

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

13 pages, 8 figures

Scientific paper

We study directed transport in periodically forced scattering systems in the regime of fast and strong driving where the dynamics is mixed to chaotic and adiabatic approximations do not apply. The model employed is a square potential well undergoing lateral oscillations, alternatively as two- or single-parameter driving. Mechanisms of directed transport are analyzed in terms of asymmetric irregular scattering processes. Quantizing the system in the framework of Floquet scattering theory, we calculate directed currents on basis of transmission and reflection probabilities obtained by numerical wavepacket scattering. We observe classical as well as quantum transport beyond linear response, manifest in particular in a non-zero current for single-parameter driving where according to adiabatic theory, it should vanish identically.

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