Controlling vortical motion of particles in two-dimensional driven superlattices

Abstract

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 motion can be created. Possible experimental realizations include holographic optical lattice based setups for colloids or cold atoms.

References in corpus (8)

• Artificial Brownian motors: Controlling transport on the nanoscale
• An atom-by-atom assembler of defect-free arbitrary 2d atomic arrays
• Tunable gauge potential for neutral and spinless particles in driven lattices
• Non-Abelian gauge fields and topological insulators in shaken optical lattices
• Directed Chaotic Transport in Hamiltonian Ratchets
• Omnidirectional Transport in Fully Reconfigurable Two Dimensional Optical Ratchets
• Reversible Ratchet Effects for Vortices in Conformal Pinning Arrays
• Vortex and translational currents due to broken time-space symmetries