Topological lattice using multi-frequency radiation
Quantum Gases
2018-09-14 v2 Atomic Physics
Optics
Quantum Physics
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.
Cite
@article{arxiv.1705.11101,
title = {Topological lattice using multi-frequency radiation},
author = {Tomas Andrijauskas and Ian B. Spielman and Gediminas Juzeliunas},
journal= {arXiv preprint arXiv:1705.11101},
year = {2018}
}
Comments
Replaced with a revised version, 15 pages, 6 figures