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Topological lattice using multi-frequency radiation



Ian B. Spielman, Gediminas Juzeli?nas, Tomas Andrijauskas


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.
New Journal of Physics


Bose Einstein Condensate, Mott Insulator, spin orbit coupling, Floquet, topology


Spielman, I. , Juzeli?nas, G. and Andrijauskas, T. (2018), Topological lattice using multi-frequency radiation, New Journal of Physics, [online], (Accessed May 18, 2024)


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Created March 19, 2018, Updated July 2, 2018