驱动混沌散射抽运angular momentum
Pumping angular momentum by driven chaotic scattering
摘要：
在一个特定的模型中研究了具有内部自由度的混沌散射和产生角动量定向输运的可能性，该模型是一个磁偶极子在空间紧凑区域内的周期调制磁场中运动。我们表明，该系统是一个不规则的散射体在其参数空间的大部分。此外，如果所有时空对称性都被打破，则会发生质量和角动量的定向输运。相应电流的敏感参数依赖性包括频繁的符号反转。任何一个量的零点都意味着另一个量的唯一出现，因此特别引起角动量分离，而没有质量输运，这是自旋极化电流的经典模拟。
英文摘要：
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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