Dynamical Generation of Topological Magnetic Lattices for Ultracold Atoms
arXiv:1506.02418 · doi:10.1103/PhysRevLett.116.143003
Abstract
We propose a scheme to dynamically synthesize a space-periodic effective magnetic field for neutral atoms by time-periodic magnetic field pulses. When atomic spin adiabatically follows the direction of the effective magnetic field, an adiabatic scalar potential together with a geometric vector potential emerges for the atomic center-of-mass motion, due to the Berry phase effect. While atoms hop between honeycomb lattice sites formed by the minima of the adiabatic potential, complex Peierls phase factors in the hopping coefficients are induced by the vector potential, which facilitate a topological Chern insulator. With further tuning of external parameters, both a topological phase transition and topological flat bands can be achieved, highlighting realistic prospects for studying strongly correlated phenomena in this system. Our Letter presents an alternative pathway towards creating and manipulating topological states of ultracold atoms by magnetic fields.
5+7 pages, 3+4 figures
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Cited by in corpus (8)
- Theory of tunable flux lattices in the homobilayer moiré of twisted and uniformly strained transition metal dichalcogenides
- Tunable Topologically-protected Super- and Subradiant Boundary States in One-Dimensional Atomic Arrays
- Magnetic lattices for ultracold atoms and degenerate quantum gases
- Floquet Heating in Interacting Atomic Gases with an Oscillating Force
- How to dress radio-frequency photons with tunable momentum
- Harmonic trap resonance enhanced synthetic atomic spin-orbit coupling
- Generating topological optical flux lattices for ultracold atoms by modulated Raman and radio-frequency couplings
- Control of Ultracold Atoms with a Chiral Ferromagnetic Film