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• W2519940344 abstract "We show that resonant dipole-dipole interactions between Rydberg atoms in a triangular lattice can give rise to artificial magnetic fields for spin excitations. We consider the coherent dipole-dipole coupling between $np$ and $ns$ Rydberg states and derive an effective spin-1/2 Hamiltonian for the $np$ excitations. By breaking time-reversal symmetry via external fields we engineer complex hopping amplitudes for transitions between two rectangular sub-lattices. The phase of these hopping amplitudes depends on the direction of the hop. This gives rise to a staggered, artificial magnetic field which induces non-trivial topological effects. We calculate the single-particle band structure and investigate its Chern numbers as a function of the lattice parameters and the detuning between the two sub-lattices. We identify extended parameter regimes where the Chern number of the lowest band is $C=1$ or $C=2$." @default.
• W2519940344 created "2016-09-23" @default.
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• W2519940344 date "2017-01-01" @default.
• W2519940344 modified "2023-10-12" @default.
• W2519940344 title "Topological spin models in Rydberg lattices" @default.
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• W2519940344 doi "https://doi.org/10.1007/s00340-016-6596-4" @default.
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