Pumping angular momentum by driven chaotic scattering

Details Pumping angular momentum by driven chaotic scattering Pumping angular momentum by driven chaotic scattering

2008-02-21

arxiv.org/abs/0802.3223v2

J. Phys. A: Math. and Theor. 41, 265102 (2008)

Nonlinear Sciences

Chaotic Dynamics

17 pages, 12 figures

Scientific paper

10.1088/1751-8113/41/26/265102

Chaotic scattering with an internal degree of freedom and the possibility to generate directed transport of angular momentum is studied in a specific model, a magnetic dipole moving in a periodically modulated magnetic field confined to a compact region in space. We show that this system is an irregular scatterer in large parts of its parameter space. If in addition all spatio-temporal symmetries are broken, directed transport of mass as well as angular momentum occurs. The sensitive parameter dependence of the corresponding currents includes frequent sign reversals. Zeros of either quantity entail the exclusive occurrence of the other and thus give rise in particular to angular-momentum separation without mass transport as a classical analogue of spin-polarized currents.

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