We demonstrate the control of vortical motion of neutral classical particles in driven superlattices. Our superlattice consists of a superposition of individual lattices whose potential depths are modulated periodically in time but with different phases. This driving scheme breaks the spatial reflection symmetries and allows an ensemble of particles to rotate with an average angular velocity. An analysis of the underlying dynamical attractors provides an efficient method to control the angular velocities of the particles by changing the driving amplitude. As a result, spatially periodic patterns of particles showing different vortical motions can be created. Possible experimental realizations include holographic optical lattice based setups for colloids or cold atoms.

中文翻译：

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控制二维驱动超晶格中粒子的涡旋运动

我们证明了中性经典粒子在驱动超晶格中的涡旋运动的控制。我们的超晶格由单个晶格的叠加组成，这些晶格的潜在深度会在时间上定期进行调制，但相位不同。这种驱动方案打破了空间反射的对称性，并允许一组粒子以平均角速度旋转。对基础动力吸引器的分析提供了一种有效的方法，可以通过更改驱动振幅来控制粒子的角速度。结果，可以创建显示出不同涡旋运动的粒子的空间周期性图案。可能的实验实现方式包括基于全息光学晶格的胶体或冷原子设置。