Topological lattice using multi-frequency radiation
arXiv:1705.11101 · doi:10.1088/1367-2630/aab7a3
Abstract
We describe a novel technique for creating an artificial magnetic field for ultra-cold atoms using a periodically pulsed pair of counter propagating Raman lasers that drive transitions between a pair of internal atomic spin states: a multi-frequency coupling term. In conjunction with a magnetic field gradient, this dynamically generates a rectangular lattice with a non-staggered magnetic flux. For a wide range of parameters, the resulting Bloch bands have non-trivial topology, reminiscent of Landau levels, as quantified by their Chern numbers.
Replaced with a revised version, 15 pages, 6 figures
References in corpus (12)
- Many-Body Physics with Ultracold Gases
- Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
- Ultracold atomic gases in optical lattices: mimicking condensed matter physics and beyond
- Atomic quantum gases in periodically driven optical lattices
- Topological Quantum Matter with Ultracold Gases in Optical Lattices
- Tunable gauge potential for neutral and spinless particles in driven lattices
- A Bose-Einstein Condensate in a Uniform Light-induced Vector Potential
- Synthetic dimensions and spin-orbit coupling with an optical clock transition
- Spin-orbit coupled fermions in an optical lattice clock
- Optical Flux Lattices for Ultracold Atomic Gases
- Practical scheme for a light-induced gauge field in an atomic Bose gas
- Flux lattices reformulated