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arXiv · 1705.11101

Topological lattice using multi-frequency radiation

Tomas Andrijauskas·Ian B. Spielman·Gediminas Juzeliunas
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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.

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Tomas Andrijauskas, Ian B. Spielman, Gediminas Juzeliunas. 2018-09-12. Topological lattice using multi-frequency radiation. https://doi.org/10.1088/1367-2630%2Faab7a3

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