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Topological lattice using multi-frequency radiation

TitleTopological lattice using multi-frequency radiation
Publication TypeJournal Article
Year of Publication2018
AuthorsT. Andrijauskas, I.. B. Spielman, and G. Juzeliunas
JournalNEW JOURNAL OF PHYSICS
Volume20
Pagination055001
Date PublishedMAY 3
Type of ArticleArticle
ISSN1367-2630
Keywordsartificial gauge fields, Floquet, flux lattice
Abstract

We describe a novel technique for creating an artificial magnetic field for ultracold 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.}, %%Address = {TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND

DOI10.1088/1367-2630/aab7a3