Anomalous charge pumping in a one-dimensional optical superlattice
arXiv:1502.04208 · doi:10.1103/PhysRevA.92.013609
Abstract
We model atomic motion in a sliding superlattice potential to explore topological "charge pumping" and to find optimal parameters for experimental observation of this phenomenon. We analytically study the band-structure, finding how the Wannier states evolve as two sinusoidal lattices are moved relative to one-another, and relate this evolution to the center of mass motion of an atomic cloud. We pay particular attention to counterintuitive or anomalous regimes, such as when the atomic motion is opposite to that of the lattice.
6 pages, 4 figures, comments are welcome
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Cited by in corpus (5)
- Fractional charge pumping of interacting bosons in one-dimensional superlattice
- Topological charge pumping by sliding moiré pattern
- Various Topological Mott insulators in strongly-interacting boson system in one-dimensional superlattice
- Topological optical Raman superlattices
- Generalized Aubry-Andre-Harper Models in Optical Superlattices