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Optical lattice with torus topology



Hwanmun Kim, Guanyu Zhu, James V. Porto, Mohammad Hafezi


We propose an experimental scheme to construct an optical lattice where the atoms are confined to the surface of a torus. This construction can be realized with spatially shaped laser beams which could be realized with recently developed high resolution imaging techniques. We numerically study the feasibility of this proposal by calculating the tunneling strengths for atoms in the torus lattice. To illustrate the non-trivial role of topology in atomic dynamics on the torus, we study the quantized superfluid currents and fractional quantum Hall (FQH) states on such a structure. For FQH states, we numerically investigate the robustness of the topological degeneracy. Our scheme for torus construction can be generalized to Riemann surfaces with higher genus for exploration of richer topological physics.
Physical Review A (Atomic, Molecular and Optical Physics)


optical lattices, torus


Kim, H. , Zhu, G. , Porto, J. and Hafezi, M. (2018), Optical lattice with torus topology, Physical Review A (Atomic, Molecular and Optical Physics) (Accessed June 25, 2024)


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Created September 25, 2018, Updated October 12, 2021